AD 51-20-02
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Martin-Marietta Corporation | 202 | Martin Models 202 and 202A Airplanes |
| aircraft | Martin-Marietta Corporation | 202A | Martin Models 202 and 202A Airplanes |
Unsafe Condition
Failure of the heater ignition interlock relay box, autopilot servo control relay box, AC and DC distribution panels, heating and ventilating control box, fuel crossfeed line shroud, electrical hydraulic pump, pitot tube heater circuits, or aileron hinge fittings could lead to fire hazards, electrical malfunctions, or structural failures.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Cover or replace specified relay boxes and distribution panels with enclosed relays; relocate fuel crossfeed line fittings or install a drained shroud; make electrical hydraulic pump explosion proof; install separate circuit breakers for pitot tube heater circuits; replace 75ST aileron hinge fittings with steel parts.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
January 1, 1952; November 15, 1951; March 1, 1952 (multiple deadlines apply depending on the specific item).
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Martin-Marietta Corporation Models 202 and 202A airplanes, 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.