AD 52-04-07
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Martin-Marietta Corporation | 202 | MARTIN Models 202 and 202A Aircraft |
| aircraft | Martin-Marietta Corporation | 202A | MARTIN Models 202 and 202A Aircraft |
Unsafe Condition
The heater control system's shared controls and wiring between two wing anti-icing heaters could lead to unintended activation or failure of both heaters, compromising engine ignition and fuel systems.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Modify the system so each control serves only one heater, including modifying the emergency high heat cutout switch, firewall shutoff switch, fuel pump circuit breaker, fuel shutoff relay, wiring to solenoid valves, fuel booster pump relay, ignition components (for 202 models), and AC safety relay (for 202).
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
not later than July 1, 1952
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Martin-Marietta Corporation Models 202 and 202A Aircraft except as noted in the AD
AI-generated summary from the source AD text. Verify against the official source before acting.
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
This site is not affiliated with or endorsed by the FAA. Always verify with official sources.