B737 | Cockpit Companion Pdf
B737 Cockpit Companion authored by retired airline Captain Bill Bulfer
, is a definitive technical reference used by professional pilots and flight simulation enthusiasts worldwide. It provides an in-depth "theory of operation" for Boeing 737 systems that often exceeds the standard information found in official Flight Crew Operating Manuals (FCOM). Key Content and Features
The guide is structured to help pilots move beyond a basic "need-to-know" understanding to a comprehensive mastery of the aircraft's internal logic. System Deep Dives
: Detailed explanations of every switch, light, and panel, including the Overhead Panel Glareshield Control Stand Technical Schematics
: High-resolution, vector-based diagrams for electrical, fuel, pneumatic, and hydraulic systems. Reference Tools
: Includes an alphabetized circuit breaker locator, an extensive glossary, and Master Minimum Equipment List (MMEL) samples. Operational Notes
: Incorporates real-world insights from Bill Bulfer's decades of experience as a line pilot. Available Formats
While many users search for a PDF version, the resource has evolved into several distinct formats: Physical Books : Often available at specialty retailers like AirlinerApps , these are pocket-sized for easy storage in the cockpit. B737 Cockpit Companion App : The most modern version, available on the Apple App Store
. It features interactive touch navigation and a powerful database engine for different configurations. Variant-Specific Guides : Covers various models including the (-300/400/500), (-600/700/800/900), and the Primary Uses B737 Cockpit Companion - App Store - Apple
Important Disclaimer
It is vital to note that the B737 Cockpit Companion is a study aid, not an official approved document. It is considered "grey literature" in the aviation community—highly accurate and respected, but not a replacement for the aircraft's approved Flight Manual (AFM) or the company's specific FCOM.
Pilots should always cross-reference the Companion with their airline's approved manuals, as system modifications and procedures can vary between different operators and specific aircraft line numbers.
Key Features of the Guide
The strength of the Companion lies in its layout and accessibility. Unlike standard manuals that are organized by chapters or ATA codes, the Companion often organizes information by cockpit panel location. This allows a pilot to look at a specific section of the overhead panel, pedestal, or main instrument panel and instantly understand the associated systems and limitations.
Key elements typically include:
- Systems Summaries: Simplified explanations of hydraulic, electrical, fuel, and pneumatic systems.
- Switchology: Detailed breakdowns of what every switch, light, and indicator does—often including the "normal" positions for various phases of flight.
- Limitations & Memory Items: Quick-reference tables for critical speeds, V-speeds, and memory item checklists.
- Schematics: Visual flowcharts that make system logic (such as fuel crossfeed or bleed air routing) easier to comprehend.
Option 3: Email / Newsletter Blurb
Subject: 🛫 New: B737 Cockpit Companion PDF – Learn the flight deck in 10 min.
Body:
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Title:
B737 Cockpit Companion PDF – Quick Reference for the Modern 737 Pilot
Description:
Designed for Boeing 737 pilots (NG and MAX), the B737 Cockpit Companion PDF is a streamlined, easy‑to‑navigate digital guide that puts essential cockpit data at your fingertips. Whether you’re in initial type rating, recurrent training, or lining up for departure, this companion helps you reduce head‑down time and fly with greater confidence.
What’s Inside:
- Memory items and immediate action drills
- FMC quick setup flow
- V‑speeds, thrust settings, and callouts
- Systems summary (electrical, hydraulic, pneumatic, flight controls)
- Limitations and operating speeds
- Approach and go‑around briefings
- Cockpit flow patterns (before start, after start, before taxi, etc.)
- QR code links to video or expanded procedures (if hyperlinked)
Format:
- Fully bookmarked PDF (works on iPad, EFB, laptop, or printed as a kneeboard card)
- Optimized for both day and night cockpit lighting
- Print‑friendly monochrome pages with red‑preserving night mode option
Ideal for:
- First officers building line experience
- Captains preparing for line checks or sims
- Flight instructors and type rating students
- 737 pilots transitioning between NG and MAX
Note:
This is a pilot‑created performance support tool — not a substitute for the official FCOM, QRH, or company manuals. Always follow approved data.
The B737 Cockpit Companion by Bill Bulfer is considered the definitive "pilot-friendly" guide for mastering the complex systems of the Boeing 737 aircraft series. Whether you are a professional pilot preparing for recurrent training or a dedicated flight simmer, this manual provides depth beyond standard airline training materials.
While many users search for a B737 Cockpit Companion PDF, the official version has transitioned into a highly interactive mobile experience. Why Pilots and Simmers Use the Cockpit Companion
Beyond "Need-to-Know": Standard manuals often simplify systems. The Companion explains the "theory of operation," helping pilots understand why systems behave a certain way.
Comprehensive Systems Data: It covers the Boeing 737 Classics, Next Generation (NG), and MAX variants.
Visual Aid: It features high-resolution, vector-based schematics and panel graphics for precise identification of controls and indicators.
Practical Tools: It includes an extensive index of over 700 items, a circuit breaker locator (with power source and ATA chapter), and detailed system notes. The Evolution of the Digital "PDF"
Although unofficial scanned PDF versions sometimes appear on document-sharing sites like Scribd, these are often outdated and lack the dynamic features of official digital versions. The primary way to access the digital Cockpit Companion today is through the B737 Cockpit Companion App on the App Store, which provides: B737 Cockpit Companion - App Store - Apple
The B737 Cockpit Companion by Captain Bill Bulfer is one of the most respected technical resources in the aviation world, serving as a vital bridge between official manufacturer manuals and the practical needs of line pilots. While many users search for a "B737 Cockpit Companion PDF," it is important to understand that the official evolution of this resource has shifted toward a highly interactive iPad application and physical spiral-bound books. What is the B737 Cockpit Companion?
Unlike a standard Flight Crew Operations Manual (FCOM), which often adheres to a strict "need-to-know" philosophy, the Cockpit Companion provides an in-depth "theory of operation" for Boeing 737 systems. Written by Bill Bulfer, a veteran airline captain, it explains not just what a switch does, but how the underlying system functions and how it interacts with other components. Key Features of the Series
The guide is available in different versions tailored to specific 737 generations, including the Classics (-300/400/500), the Next Generation (NG) (-600/700/800/900), and the 737 MAX.
High-Resolution Schematics: Features detailed vector-based drawings of electrical, hydraulic, and pneumatic systems.
Circuit Breaker Locator: Includes an extensive, alphabetized list of circuit breakers with their locations and power sources.
Panel-by-Panel Descriptions: Every light, switch, and indicator in the cockpit is meticulously detailed.
Practical Insights: Notes derived from decades of real-world flying experience that clarify complex system behaviors often glossed over in official training. PDF vs. App vs. Physical Book B737 Cockpit Companion - App Store - Apple
The B737 Cockpit Companion by Bill Bulfer is considered a premier technical reference for pilots and simulator enthusiasts, offering in-depth system knowledge, schematics, and configuration customization. While traditionally a book, the resource is now primarily available as an interactive digital app, featuring regular updates for various 737 models. For more details, visit the Airliner Apps website. B737 Cockpit Companion B737 Cockpit Companion authored by retired airline Captain
Boeing 737 Cockpit Companion (often abbreviated as CC) is a renowned technical reference guide used by airline pilots, trainees, and flight simulator enthusiasts to master the complex systems of the B737 aircraft. The Legacy of the Cockpit Companion Authored by Bill Bulfer
, a veteran airline pilot, the guide was created to bridge the gap between standard manufacturer manuals and the practical knowledge required in the cockpit. While Boeing provides the Flight Crew Operating Manual (FCOM), the Cockpit Companion is often preferred for its digestible format and "plain English" explanations of how systems actually interact. Key Features and Content
The guide, available in both printed and digital formats (including interactive iPad apps), provides a comprehensive breakdown of every switch, light, and dial in the cockpit. Interactive Systems Study
: Digital versions allow users to click on specific cockpit components to see their function, related wiring, and how they behave during malfunctions. Model Coverage
: It covers various generations of the aircraft, including the Classic (CL) Next Generation (NG) Circuit Breaker (CB) Locations
: A critical feature for pilots is the detailed mapping of circuit breakers, which are often difficult to locate quickly in high-stress situations. Integration with Official Manuals : It acts as a supplement to the Quick Reference Handbook (QRH)
, providing deeper context on "why" a system operates a certain way, rather than just "how" to operate it. Role in Pilot Training
For pilots undergoing a type rating or recurrent training, the "B737 Cockpit Companion PDF" or app is considered an essential study aid. It is particularly valued by Training Captains (TRE/TRI)
for its accuracy and its ability to simplify complex electrical, hydraulic, and pneumatic system logic.
Despite being a paid, third-party resource, it remains a gold standard in the aviation community because it translates dense engineering data into actionable pilot knowledge. (like the NG or MAX) or a detailed summary of a particular system, such as hydraulics or electrics?
The B737 Cockpit Companion (often referred to as the B737 "Pit" Companion) is primarily a technical deep-dive into the Boeing 737's systems. While its core purpose is professional training, it also serves as a vital resource for the "pilot lifestyle"—balancing technical mastery with the unique demands of life on the flight deck and during layovers. The "Pit Companion" as a Lifestyle Asset
For professional pilots and simulation enthusiasts, this guide is more than a manual; it’s a "lifestyle" tool for efficiency and confidence.
Rapid Reference: Its compact size is designed specifically to fit in the side pockets of the B737 throttle quadrant, making it a constant physical companion during long cruise phases.
Skill Mastery: It moves beyond "need-to-know" training, offering "Theory of Operation" insights that help pilots understand the "why" behind the automation, reducing the stress of technical troubleshooting.
Digital Integration: The App Store version includes interactive cockpit graphics, flashcard creation, and note-taking features, allowing pilots to study and refresh their knowledge flexibly during downtime or commutes. Entertainment & Passing Time at 30,000 Feet
While the Cockpit Companion is a technical resource, B737 pilots often balance professional duties with light entertainment during the cruise phase of flight.
Technical "Leisure" Reading: Many aviation enthusiasts and pilots find entertainment in "flicking through manuals" like the Cockpit Companion with a coffee to stay sharp.
Common Cockpit Activities: When not monitoring systems or paperwork, pilots often engage in:
Puzzles & Games: Crosswords, Sudoku, or simple smartphone/tablet games.
Creative Outlets: Sketching, photography (clouds, sunrises), and even niche hobbies like knitting or building model furniture.
Audio Entertainment: Listening to podcasts (like the Pilot Life Podcast) or curated music playlists that match the destination's vibe. What do pilots do to entertain themselves on a long flight? Option 3: Email / Newsletter Blurb Subject: 🛫
Introduction
The Boeing 737 is a narrow-body, twin-engine jet airliner that has become one of the most popular and widely used aircraft in the world. The 737 cockpit is designed to provide pilots with a safe and efficient means of controlling the aircraft, and it is equipped with a range of instruments, systems, and controls.
Cockpit Layout
The 737 cockpit is divided into several sections, including:
- Flight Deck: The flight deck is the main working area of the cockpit, where the pilots sit and control the aircraft.
- Instrument Panel: The instrument panel is located in front of the pilots and contains a range of instruments and controls, including the primary flight display (PFD), navigation display (ND), and engine instruments.
- Overhead Panel: The overhead panel is located above the instrument panel and contains controls and switches for various aircraft systems, including electrical, hydraulic, and pressurization.
- Pedestal: The pedestal is a console located between the pilots' seats and contains controls and switches for the aircraft's systems, including the autothrottle and flap controls.
Instruments and Controls
The 737 cockpit contains a range of instruments and controls, including:
- Primary Flight Display (PFD): The PFD displays critical flight information, including altitude, airspeed, heading, and attitude.
- Navigation Display (ND): The ND displays navigation information, including the aircraft's position, route, and nearby airports.
- Engine Instruments: The engine instruments display information about the aircraft's engines, including thrust, fuel flow, and oil pressure.
- Autopilot and Autothrottle: The autopilot and autothrottle systems allow the aircraft to be flown automatically, and the controls for these systems are located on the pedestal.
- Flap and Slat Controls: The flap and slat controls are located on the pedestal and are used to control the aircraft's high-lift devices.
- Landing Gear Controls: The landing gear controls are located on the pedestal and are used to control the aircraft's landing gear.
Systems
The 737 cockpit contains a range of systems, including:
- Electrical System: The electrical system provides power to the aircraft's systems and is controlled from the overhead panel.
- Hydraulic System: The hydraulic system provides power to the aircraft's hydraulic systems, including the landing gear and flaps.
- Pressurization System: The pressurization system controls the air pressure in the aircraft's cabin and is controlled from the overhead panel.
- Fuel System: The fuel system manages the aircraft's fuel supply and is controlled from the overhead panel.
Controls and Switches
The 737 cockpit contains a range of controls and switches, including:
- Thrust Levers: The thrust levers control the aircraft's engines and are located on the pedestal.
- Flap Switches: The flap switches control the aircraft's flaps and are located on the pedestal.
- Landing Gear Switches: The landing gear switches control the aircraft's landing gear and are located on the pedestal.
- Autopilot Switches: The autopilot switches control the aircraft's autopilot system and are located on the pedestal.
** Warning and Alert Systems**
The 737 cockpit contains a range of warning and alert systems, including:
- Master Warning: The master warning system alerts the pilots to critical system failures or warnings.
- Master Caution: The master caution system alerts the pilots to non-critical system failures or warnings.
- Warning Lights: The warning lights display critical system failures or warnings, including engine failure and system malfunctions.
Boeing 737 Cockpit Companion PDF
The Boeing 737 Cockpit Companion PDF is a comprehensive guide to the 737 cockpit, covering the aircraft's systems, instruments, and controls. The guide includes detailed diagrams and illustrations of the cockpit layout, as well as explanations of the aircraft's systems and operations.
Conclusion
The Boeing 737 cockpit is a complex and sophisticated system that requires a deep understanding of its instruments, controls, and systems. This guide has provided a comprehensive overview of the 737 cockpit, covering its layout, instruments, controls, systems, and warning and alert systems. Whether you're a seasoned 737 pilot or just starting your training, this guide is intended to be a valuable resource in your journey to become familiar with the 737 cockpit.
References
- Boeing 737 Cockpit Companion PDF
- Boeing 737 Flight Crew Operations Manual
- Boeing 737 Systems Manual
Recommended Reading
- Boeing 737 Technical Manual
- Boeing 737 Flight Crew Training Manual
- Boeing 737 Systems and Instruments Handbook
2. Memory Items & Immediate Action Items (IAI)
The PDF should list them verbatim from Boeing (e.g.,):
- Engine Severe Damage or Fire – Autothrottle (disc) – Thrust lever (confirm close) – Engine fire switch (pull rotate 14 sec) – Bottle 1 (discharge).
- Cabin Altitude Warning – Don masks – Establish crew communications – Pressurization mode selector (MAN) – Outflow valve (control).
Common Mistakes to Avoid with the PDF Companion
- Mistake 1: Using a 737-800 PDF for a 737-900ER. The -900ER has different tailstrike margins and door limitations.
- Mistake 2: Relying only on the PDF for checklist completion. The companion is a reminder, not a substitute for the approved QRH.
- Mistake 3: Forgetting that the MAX has a different engine start procedure (waiting for N2 25% for LEAP vs. 16% for CFM).
- Mistake 4: Not updating the PDF. Boeing issues FCOM bulletins every quarter. If your PDF is from 2018, the Runaway Stabilizer procedure has changed.
Critical Content: What a High-Quality B737 Cockpit Companion Must Include
Not all PDFs are created equal. A top-tier B737 Cockpit Companion PDF should be version-specific. Below is a breakdown of essential sections by aircraft variant.
The Future of the Cockpit Companion: PDF Plus Apps
While the B737 Cockpit Companion PDF remains popular, the industry is shifting toward interactive apps like:
- B737 Cockpit Master (iOS/Android) – Animated flows.
- 737 Companion App (by Aerobatics) – Voice-activated checklist mode.
However, the PDF endures because it is non-proprietary, works offline, prints to any size, and never crashes. In a cockpit, redundancy matters. Keep a PDF on your primary iPad, your backup iPhone, and a laminated printout in your flight bag.