SDR ASAA2018071625400

Service difficulty report · Oil Cooler · Boeing 737900ER

Difficulty date: July 4, 2018
Submitted: July 17, 2018
Operation: Air carrier
Aircraft: N407AS
Make and model: Boeing 737900ER
Aircraft serial: 41731
Aircraft time: 22,259 hours, 7,210 cycles
System (JASC): 2421 · AC Generator-Alternator
Part: Oil Cooler
Part number: UA5385513
Part serial: 9911
Condition: Leaking
Location: Nr 1 Idg
Part time: 22,354 hours, 7,240 cycles
Stage of operation: IN
How discovered: V
Nature of condition: K
Precautionary procedure: K

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

What was found

FOLLOW-UP TO NR 1 IDG FREQUENT SERVICING GROUNDED - YES. ACCOMPLISHED STATIC IDG LEAK CHECK REF AMM 24-11-00, NO DEFECTS NOTED. ACCOMPLISHED ENGINE IDLE LEAK CHECK REF AMM 2411-00, FOUND LEAK AT AIR/OIL COOLER. REPLACED NR 1 ENGINE IDG AIR/OIL COOLER REF AMM 24-11-21, LEAK CHECK GOOD. NO OTHER EXTERNAL LEAKS NOTED.

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