SDR DL777030065

Service difficulty report · Acm · Boeing 777232

Difficulty date: January 15, 2003
Submitted: March 4, 2003
Operation: Air carrier
Aircraft: N860DA
Make and model: Boeing 777232
Aircraft serial: 29951
Aircraft time: 15,463 hours, 3,392 cycles
System (JASC): 2150 · Cabin Cooling System
Part: Acm
Condition: Odor
Location: Lt Pack Bay
Stage of operation: CL
How discovered: O
Nature of condition: B
Precautionary procedure: O

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

What was found

FUMES IN COCKPIT ON CLIMB AND DESCENT WENT AWAY WHEN LT PACK SWITCHED OFF. SNAPSHOTS SHOWED LT PACK O/P TEMP HIGH WITH TBV IN SAME POSITION AS RT DISCONNECTED AND OPENED LT TBV ODOR DISAPPEARED. SUSPECT LT ACM FWD TO MCO AND PLACED PER MEL 21-52-01. UPDATE: REACTIVATED TURBINE BYPASS VALVE AND RAN LT PACK F HOURS AT DIFFERENT TEMP SETTINGS, NO FUMES OR ODORS. PACK INDICATIONS NORMAL, C/W LT PACK TEMP CONTROL PASS MCO AND PLACARD REMOVED.