SDR 95ZZZM543

Service difficulty report · Start Valve · Boeing 747131

Difficulty date: September 13, 1995
Submitted: March 26, 2000
Operation: Air carrier
Aircraft: N93104
Make and model: Boeing 747131
Aircraft serial: 19670
System (JASC): 8012 · Engine Start Valves/Controls
Part: Start Valve
Part number: 7265747
Condition: Failed
Location: Nr 1 Engine
Stage of operation: CR
Nature of condition: J
Precautionary procedure: E

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

What was found

STL - DURING CRUISE SHUT DOWN NR 1 ENGINE, S/N 4165, DUE TO START VALVE LIGHT ILLUMINATED. FOUND START VALVE PRESSURE SWITCH, MFG P/N 21SN41-1B, WITH INTERNAL MALFUNCTION. REPLACED START VALVE PRESSURE SWITCH AND START VALVE, MFG P/N 726574-7. ENGINE OPERATION AND LEAK CHECK NORMAL.