SDR CALA2013100791763

Service difficulty report · Pin · Boeing 777222

Difficulty date: October 6, 2013
Submitted: October 8, 2013
Operation: Air carrier
Aircraft: N798UA
Make and model: Boeing 777222
Aircraft serial: 26928
Aircraft time: 69,071 hours, 9,777 cycles
Engine: Pwa PW40903
System (JASC): 2150 · Cabin Cooling System
Part: Pin
Condition: Missing
Location: Ac Bay
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

RT AIR COND PACK BAY, FOUND RT AMC BOTTOM SIDE MISSING AN INDEX ROLL PIN, HOT AIR BLOWING IN COMPARTMENT. INOPED SECOND STAGE TURBINE BYPASS VALVE IN OPEN POSITION, REMOVED & CAPPED CONNECTOR. SWAPPED LT & RT LOW LIMIT VALVE. SECOND STAGE TURBINE BYPASS VALVE OPEN & DISCONNECTED SECURED ELECTRIC PLUG. ACCOMPLISHED REPLACEMENT OF MISSING ALIGNMENT PIN IAW ECRA 2152-01204. PACK OPERATIONS CHECKED NORMAL IAW MM 21-52-02 PARA 3I. REACTIVATED 2ND STAGE TURBINE BYPASS VALVE IAW MEL 2152A.