SDR CALA2013101692131

Service difficulty report · Shutoff Valve · Boeing 767322

Difficulty date: October 13, 2013
Submitted: October 17, 2013
Operation: Air carrier
Aircraft: N658UA
Make and model: Boeing 767322
Aircraft serial: 27113
Aircraft time: 90,353 hours, 14,361 cycles
Engine: Pwa PW4060
System (JASC): 7520 · Engine Cooling System
Part: Shutoff Valve
Condition: Malfunctioned
Location: Nr 2 Engine
Stage of operation: IN
How discovered: V
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

DURING TROUBLESHOOTING OF NR 2 ENG IAW EM4271-2, FOUND LPT COOLING SHUTOFF VLV NOT FULLY CLOSING. FOUND HPT VLV IN THE OPEN POSITION WHEN SHOULD BE CLOSED IAW MM75-24-00-601. REACTIVATED & CHECKED THE TCC ACTUATION SYSTEM IAW AMM 75-24-00. RAN NR 2 ENG ACCOMPLISHED TEST NR 2 & NR 6 IAW 71-00-00.