SDR DL75E081362

Service difficulty report · Shutoff Valve · Boeing 757231

Difficulty date: October 14, 2008
Submitted: October 20, 2008
Operation: Air carrier
Aircraft: N722TW
Make and model: Boeing 757231
Aircraft serial: 29385
Aircraft time: 26,196 hours, 9,438 cycles
Engine: Pwa PW2037
Engine time: 25,907 hours, 9,325 cycles
System (JASC): 7320 · Fuel Controlling System
Part: Shutoff Valve
Condition: Fod
Location: Fuel System
Part time: 25,907 hours, 9,325 cycles
Stage of operation: IN
How discovered: O
Nature of condition: C
Precautionary procedure: K

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

What was found

DURING PREFLT FOR FUEL CONTROL CHANGE HAD LOW AIR FROM NR 1 ENG AFTER REMOVING HPSOV FOUND METAL STRIPS INSIDE VALVE. CONSULTED ENGINE SHOP AND DETERMINED TO BE AIRSEAL FROM 12TH TO 13 STG COMPRESSOR SECTION. REPLACED NR 1 ENGINE PER TRANS 6T103.