Service difficulty report · Bypass Valve · Bombdr DHC8402

Difficulty date
September 11, 2012
Submitted
September 17, 2012
Operation
Air carrier
Aircraft
N435QX
Make and model
Bombdr DHC8402
Aircraft serial
4232
Aircraft time
8,936 hours, 9,767 cycles
Engine
Pwc PW150A
Part
Bypass Valve
Part number
D2887355C
Part serial
1510
Condition
Malfunctioned
Location
Oil Cooler
Part time
4,605 hours, 4,889 cycles
Stage of operation
CL
How discovered
O
Nature of condition
M, 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

AT APPROXIMATELY 16,000 FT, OIL TEMP 107 DEGREES AND CLIMBING SLOWLY. STARTED HIGH OIL TEMP CHECKLIST, OIL TEM CLIMBED TO 125 DEGREES. SHUTDOWN NR 1 ENGINE. LANDING UNEVENTFUL. INTEROGATED CDS AND FOUND NR 1 ENGINE PEAK VALUE 125.7 DEGRESS C AND AREA B 698 SECONDS. COMPLIED WITH AMM TASK 05-53-00-210-814. REPLACED NR 1 OIL COOLER BYPASS VALVE IAW AMM TASK 79-21-06-000-801/400-801. OPS CHECKED GOOD. NO LEAKS NOTED. ALSO REPLACED NR 1 OIL COOLER DOOR ACTUATOR. RETURNED TO SERVICE.