A-81-144
NTSB Safety Recommendation — Aviation
Recommendation text
SINCE THE DISENGAGEMENT OF THE MAIN LANDING GEAR TORQUE LINK ASSEMBLY RESULTS IN A POTENTIALLY HAZARDOUS SITUATION TO THE AIRCRAFT AND ITS OCCUPANTS, THE NTSB RECOMMENDS THAT THE FEDERAL AVIATION ADMINISTRATION: ISSUE AN AIRWORTHINESS DIRECTIVE TO REQUIRE IMMEDIATE AND PERIODIC INSPECTIONS OF THE MAIN LANDING GEAR TORQUE LINK APEX BOLTS, P/N 4925624, FOR MISSING SAFETY PINS OR LOOSE APEX NUTS, EXCESSIVE WEAR, LACK OF PERMANENT IDENTIFICATION, OR THE ABSENCE OF CADMIUM PLATING AND TO REQUIRE THAT IF ANY OF THESE CONDITIONS ARE DETECTED, THE BOLTS SHOULD BE REPLACED WITH NEW BOLTS INCORPORATING THE DOUBLE LOCKING FEATURE REFER ENCED IN THE DOUGLAS AIRCRAFT COMPANY'S ALL OPERATORS LETTER 9-1261.
In plain language (FlightFinder summary)
The NTSB asks the Federal Aviation Administration to issue an airworthiness directive mandating immediate and periodic inspections of main landing gear torque link apex bolts (part number 4925624) for missing safety pins or loose apex nuts, excessive wear, lack of permanent identification, or absence of cadmium plating. If any of these conditions are found, the bolts must be replaced with new bolts that include the double locking feature referenced in Douglas Aircraft Company's All Operators Letter 9-1261. This is because disengagement of the main landing gear torque link assembly can create a hazardous situation for the aircraft and its occupants.
This plain-language summary is written by FlightFinder to explain the recommendation above. It is not the official wording — the verbatim NTSB text is quoted above.
Details
| Status | Closed - Acceptable Alternate Action |
|---|---|
| Mode | Aviation |
| Closed | Sep 7, 1982 |
| NTSB number | DCF81IA002 |
| Addressees | FAA |
External links
NTSB safety recommendations are advisory; addressees are not legally required to adopt them. Source: NTSB CAROL (public domain).