SDR SWAA095077

Service difficulty report · Pressure Switch · Boeing 7377H4

Difficulty date
August 8, 2009
Submitted
August 10, 2009
Operation
Air carrier
Aircraft
N231WN
Make and model
Boeing 7377H4
Aircraft serial
32499
Aircraft time
13,194 hours, 7,672 cycles
Engine
Ge CFM567B24
Engine time
13,195 hours, 7,672 cycles
Part
Pressure Switch
Part number
QA07670
Condition
Faulty
Location
Nr 2 Engine
Stage of operation
DE
How discovered
O
Nature of condition
J
Precautionary procedure
E, A

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

What was found

INFLIGHT SHUTDOWN / DIVERSION / DECLARED EMERGENCY. NR 2 ENG OIL BYPASS LIGHT CAME ON, REDUCED TO 62 PERCENT LIGHT WENT OUT. DURING DESCENT AT IDLE. LIGHT CAME BACK ON ENGINE SHUT DOWN. REMOVED AND REPLACED NR 2 ENG OIL DIFFERENTIAL PRESS SWITCH PER MM. DUE TO METAL FRAGMENT ANALYSIS OF CHIPS FOUND IN NR 2 MOTOR FWD SUMP. REPLACED THE NR 2 ENG PER POWER PLANT ENGINEERING. REMOVED AND REPLACED NR 2 ENG PER MT.

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