SDR P5CA9600160

Service difficulty report · Prbc Line · Boeing 747123

Difficulty date: March 16, 1996
Submitted: March 26, 2000
Operation: Air carrier
Aircraft: N858FT
Make and model: Boeing 747123
Aircraft serial: 20109
Engine: Pwa JT9D7A
System (JASC): 7530 · Compressor Bleed Control
Part: Prbc Line
Part number: BACH7A01363AR
Condition: Leaking
Location: Nr 4 Engine
Stage of operation: DE
Nature of condition: Y, J
Precautionary procedure: E

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

What was found

AT TOP OF DESCENT, NR 4 ENGINE COMPRESSOR STALLED WITH EGT RISE, SHUTDOWN ENGINE AND RESTARTED. ENGINE STARTED AND STABILIZED NORMALLY, USED ENGINE FOR REMAINDER OF FLIGHT, OPS NORMAL. PERFORMED BLEED CHECK, BORESCOPE AND PT2 LEAK CHECK, FOUND FLEX LINE FROM PRBC LEAKING. REPLACED SAME IAW MM 77-11-03, OPS CHECK NORMAL.