BOSTON, MA, USA
N915TS
BOEING 727-254
THE CREW OF A BOEING 727 WAS UNABLE TO LOWER THE NOSE LANDING GEAR BY EITHER NORMAL MEANS OR BY USE OF THE MANUAL HANDCRANK. A NOSE GEAR UP LANDING WITH AN EMERGENCY EVACUATION THROUGH THE L1/R1 EXITS WAS MADE. POST INCIDENT INVESTIGATION SHOWED THAT BOTH LINKS WHICH REMOVE THE LOCKING PAWLS IN THE NOSE GEAR DRAG BRACE WERE FRACTURED. WHEN EXAMINED AT BOEING METALLURGICAL LABORATORY, NO EVIDENCE WAS FOUND THAT BUSHINGS WERE INSTALLED.
THE FAILURE OF THE LANDING GEAR DRAG BRACE TO UNLOCK DURING LANDING. CONTRIBUTING WAS THE FAILURE OF PACIFIC SOUTHWEST AIRLINES TO CATCH THE INCORRECT ASSEMBLY. AN ADDITIONAL FACTOR WAS THE USE OF FAULTY INFORMATION BY EASTERN AIRLINES AND THEIR DECISION TO NOT MAKE THE INSPECTION REQUIRED BY THE BOEING SERVICE LETTER.
Source: NTSB Aviation Accident Database
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