Service difficulty report · Manifold · Boeing 777222

Difficulty date
March 18, 2012
Submitted
April 5, 2012
Operation
Air carrier
Aircraft
N771UA
Make and model
Boeing 777222
Aircraft serial
26932
Aircraft time
66,332 hours, 12,065 cycles
Engine
Pwa PW4077
Part
Manifold
Part number
51U55101
Condition
Faulty
Location
Lt Eec
Stage of operation
NR
How discovered
O
Nature of condition
O
Precautionary procedure
O

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

What was found

ENG EEC MODE L LEFT ENGINE ELECTRONIC ENGINE CONTROL (EEC) IS IN THE ALTERNATE CONTROL MODE (EITHER BY DEFAULT DUE TO A CONTROL FAILURE OR MANUALLY SELECTED BY THE FLIGHT CREW). ADVISORY MSG01- NOT ACTIVE INITIAL CLIMB MODE DEPENDENT; ENG PRESS RATIO (EPR) (L ENG) P4.95 MANIFOLD IS BLOCKED OR LEAKING. DB- ELECTRONIC ENGINE CONTROL (L ENG, CH B) MSG-7761121 INACTV IC MODE. FOUND A P4.95 PROBES COLLECTING TUBE AT 6'CLOCK POSITION CRACKED (TUBE UPPER SIDE). REF IPC 77-11-01-002 ITEM 207 (NOT CONFIRMED). MEL PROCEDURES DONE. -INF- :IPC REF 77-11-00-002 ITEM 120. PARTS: 223-1036 51U551-01 (MANIFOLD AY). REPLACED SENSE LINE PER A MM77-11-02 AND TEST PER AMM 71-00-00 TEST 6. NO FAULTS.