A-7512-24 – Wamco Inc. 26W Incandescent Lamp
Part Number: A-7512-24
Manufacturer: Wamco Inc.
Standard Compliance: MS25237-7512 / AN3121-7512
Common Synonyms: Aircraft Nav Light Bulb, Position Light Lamp, 28V 26W Bulb
Overview Section
The A-7512-24 is a high-intensity, aviation-grade incandescent lamp engineered by Wamco Inc. for use in primary aircraft lighting systems. This lamp is specifically designed for 28V DC electrical architectures commonly found in turbine-powered aircraft, including the Cessna Citation, Beechcraft King Air, and various military transport platforms.
As a critical component for nighttime and IFR (Instrument Flight Rules) operations, the A-7512-24 provides the required luminous flux for external position and navigation lights. It features a ruggedized C-2V filament structure to withstand the high-vibration environment of an airframe and a Bayonet (B15s) base for secure electrical contact under mechanical stress.
Enhanced Technical Data
| Technical Metric | Specification Data |
| Design Voltage | 28.0 Volts DC |
| Wattage | 26.0 Watts (Nominal) |
| Amperage | 0.93 Amps |
| Luminous Intensity | 21.0 MSCP (Mean Spherical Candle Power) |
| Average Rated Life | 300 Hours (at design voltage) |
| Base Type | B15s (Single Contact Midget Bayonet) |
| Bulb Shape | S-8 (Clear) |
| Filament Type | C-2V (Reinforced for vibration) |
| Overall Length (MOL) | 2.00 in (50.8 mm) |
| Glass Diameter | 1.04 in (26.4 mm) |
Advanced Engineering & Structural Application
The A-7512-24 is engineered for Optical Precision and Heat Dissipation. Unlike standard automotive bulbs, aviation lamps must maintain a specific light center length (LCL) to ensure that the light produced is correctly focused by the navigation light’s parabolic reflector and colored lens (Red, Green, or White).
Engineering Insight: C-2V Filament Durability
The A-7512-24 utilizes a C-2V filament configuration, which features additional support anchors for the tungsten coil. In aircraft, lamps are subject to "harmonic vibration" from engines and aerodynamic buffeting. The reinforced C-2V structure prevents "filament sag" and premature burnout caused by mechanical shock during landing or turbulence.
MS/AN Cross-Reference
This lamp is the commercial equivalent to military standard MS25237-7512. It is qualified for use in flight-critical exterior lighting assemblies where the light output must meet FAA FAR Part 23/25 requirements for angular light distribution and intensity.
Aircraft Compatibility
The A-7512-24 is a high-utilization lamp found in the following aircraft and assemblies:
Cessna Citation Series: Primary wingtip and tail position light assemblies.
Beechcraft King Air 90/100/200/300: Standard navigation lighting.
Piper Cheyenne & Navajo: Used in high-voltage 28V electrical systems.
Grimes/Whelen Lighting Assemblies: Compatible with classic Grimes navigation light housings found on many vintage and turbine airframes.
The Wamco A-7512-24 is the industry-trusted solution for maintaining the exterior visibility of your aircraft. When flying at night or in low-visibility conditions, the reliability of your navigation lights is paramount. This OEM-quality lamp provides consistent 21 MSCP output, ensuring your aircraft remains compliant with civil and military lighting regulations. Engineered to withstand the rigors of flight, the A-7512-24 offers a reinforced filament and precision bayonet base to prevent flickering and premature failure. Don't settle for "look-alike" lamps—ensure your airframe’s safety with genuine Wamco aviation lighting.
Installation & Maintenance Addendum
Lens Cleaning: When replacing the A-7512-24, always inspect and clean the internal side of the navigation light lens. Carbon buildup or dust on the lens can reduce light output by up to 40%.
Base Inspection: Inspect the bayonet socket for signs of "pitting" or arcing. A loose or corroded socket will create high resistance, causing the bulb to run hotter and significantly shortening its 300-hour service life.
Handling: While not as sensitive as halogen lamps, it is recommended to handle the glass with a clean cloth. Skin oils can create "hot spots" on the S-8 glass envelope, potentially leading to premature cracking under high thermal loads.
Alternate Part Numbers: EN2240A7512-24, 6240PL0129047, M6363/2-2, MIL-L-6363/2, NLI-7512-24
Product Overview
An item whose principal purpose is to produce light from a glowing filament(s). It includes metal backed and reflecting types, seal beam, and flood types. It may include an integral filament shield to control and/or modify its illumination pattern.
Item Specification
| Overall Length | | 2.504 inches maximum |
| Filament Designation | CC-6 | |
| Light Output Rating | 180.000 beam candlepower nominal single rating | |
| Average Life Rating in Hours | 300.0 | |
| Filament Heavy Duty Service Rating | Rough service | |
| Emitted Light Characteristic | Colorless | |
| Light Center Length | 1.250 inches maximum | |
| Voltage Rating | 28.000 volts nominal | |
| Wattage Rating | 28.000 watts | |
| Base Style | Single contact bayonet candelabra indexing | |
| Bulb Style | Gg (glass globular) | |
| Bulb Designator | GG-10 | |
| Bulb Light Transmission Characteristic | Transparent | |
| Light Intensity Distribution Feature | Reflective bowl | |
| Current Rating for Which Designed | 1.000 amperes maximum | |
| Rated Average Life | Hours | |
| Burning Position | Any acceptable | |
| Special Features | Unique military application; 140 deg C, 285 deg F continuous operating temp rating; shock rating for gravity rated at 90; random vibration, humidity, and salt spray resistant |
Fits in
- Dassault Falcon 2000 all variants
- Dassault Falcon 900 all variants
- Pilatus PC-12
- Textron Aviation Beechcraft King Air 100 - all variants
- Textron Aviation Beechcraft King Air 200 - all variants
- Textron Aviation Beechcraft King Air 300 - all variants
- Textron Aviation Beechcraft King Air 90 - all variants
- Textron Aviation Bell 206 Jetranger/Longranger
- Textron Aviation Cessna 500 Citation I-ISP
- Textron Aviation Cessna 525 Citation Citationjet
- Textron Aviation Cessna 560 Citation V-Ultra-Encore-Excel-XLS
- Textron Aviation Hawker 400-400XP
- Textron Aviation Hawker 700
- Textron Aviation Hawker 800XP-850XP