B737 Maintenance Mastermind

B737 Maintenance Mastermind is an independent quick-reference and utility app designed to support aircraft technicians, engineers, mechanics, and aviation professionals working with Boeing 737 NG and MAX aircraft.

The B737MM app combines fast offline tools with secure premium reference modules, helping users quickly find maintenance-related information, calculations, references, and troubleshooting guidance during study, training, planning, or daily technical routines.

**Free Tools Included**

• **MEL Calculator**

Quick helper for standard dispatch time limit calculations.

• **Unit Converter**

Fast conversion of common aviation units, including pressure, temperature, volume, weight, and fuel-related values.

• **Fuel Calculator**

Useful fuel uplift and density calculation tool for quick planning and cross-checking.

• **Abbreviations Dictionary**

Large searchable glossary of aviation, maintenance, and technical abbreviations.

**Premium Reference Modules**

• **Alerts**

Searchable cockpit alert, status, and message references with related technical context.

• **Flags**

Reference guide for PFD, ND, FMC/CDU, and display flags.

• **BITE**

Built-In Test Equipment reference module with test access information and related troubleshooting links.

• **MEL Reference**

Fast searchable Minimum Equipment List reference support for NG/MAX style workflows.

• **CDL Reference**

Configuration Deviation List reference module for missing or deferred aircraft configuration items.

• **Circuit Breakers / CB**

ATA-grouped circuit breaker reference with panel-related information.

• **Lights**

Cockpit, annunciator, and system light reference module with related system context.

• **Location**

Aircraft component, access panel, service panel, antenna, and equipment location references.

• **STA Map**

Station, frame, stringer, waterline, and aircraft location reference helper for quick orientation.

• **Visual Panels**

Interactive-style visual reference for cockpit panels and related light/panel locations.

• **Support & Materials**

Technical support notes, fastener/material references, practical troubleshooting notes, and maintenance helper information.

**Premium Access**

Premium reference modules require an active subscription managed securely through Google Play Billing. Subscriptions and trial availability are handled by Google Play. You can manage or cancel your subscription at any time in your Google Play account settings.

Some premium content may require internet access for first download, subscription verification, or content updates. Once available on the device, cached content is designed for fast access.

**Important Disclaimer**

This application is an independent reference and training support tool. It is not official Boeing documentation and is not affiliated with, endorsed by, sponsored by, or associated with The Boeing Company, any airline, aircraft operator, maintenance organization, or aviation authority.

The information in this app is provided for educational, training, and general reference purposes only. The official Aircraft Maintenance Manual (AMM), Fault Isolation Manual (FIM), Illustrated Parts Catalog (IPC), Wiring Diagram Manual (WDM), Structural Repair Manual (SRM), and the operator-approved MEL/CDL are the only official sources and must always take precedence.

Do not use this application as the sole source for aircraft maintenance actions, dispatch release decisions, operational decisions, or work on an actual aircraft.