SDR DL757020888

Service difficulty report · Relay · Boeing 757232

Difficulty date: July 29, 2002
Submitted: August 14, 2002
Operation: Air carrier
Aircraft: N637DL
Make and model: Boeing 757232
Aircraft serial: 23760
Aircraft time: 48,508 hours, 24,198 cycles
System (JASC): 3230 · Landing Gear Retraction/Extension System
Part: Relay
Condition: Failed
Location: Landing Gear
Stage of operation: IN
How discovered: C
Nature of condition: O
Precautionary procedure: K

As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.

What was found

WHILE PERFORMING 757 ACJIC 6017 GEAR DOORS FAILED TO OPERATE AS REQUIRED. TROUBLESHOOTING REVEALED POWERPACK MOTOR HAD BAD INTERNAL WINDING DUE TO CONSTANT VOLTAGE APPLICATION. RELAY K10369 AND POWERPACK ASSY WERE CHANGED AND TESTED PER 757ACJIC OP 6017 WITH NO FURTHER PROBLEMS. AC WAS RETURNED TO SERVICE AFTER COMPLETING SCHEDULED MTC. FAILURE OF RELAY K10369 IN CLOSED POSITION CAUSED FAILURE OF POWERPACK ASSY.