SDR ASMF200704011

Service difficulty report · Pressure Valve · Doug DC987

Difficulty date: April 13, 2007
Submitted: April 16, 2007
Operation: Air carrier
Aircraft: N754RA
Make and model: Doug DC987
Aircraft serial: 49641
Aircraft time: 39,881 hours, 27,539 cycles
Engine: Pwa JT8D219
Engine time: 39,635 hours, 26,864 cycles
System (JASC): 7920 · Engine Oil Distribution (Airframe Furnished)
Part: Pressure Valve
Part number: 811131
Part serial: 26570
Condition: Failed
Location: Oil System
Part time: 12,081 hours, 8,441 cycles
Stage of operation: CL
How discovered: O
Nature of condition: M, J
Precautionary procedure: A

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

What was found

AIRCRAFT RETURNED, DUE TO HIGH OIL PRESSURE (57 PSI) AND TEMPERATURE (157 DEGREES C) INDICATIONS OF RT ENGINE WERE SHOWN. DURING MAINTENANCE CHECK, A BOROSCOPIC INSPECTION WAS PERFORMED AND CHIP DETECTOR WAS CHECKED, ALL CORRECT. AS PRECAUTIONARY ACTION OIL, FILTER AND OIL PRESSURE REGULATOR VALVE WERE REPLACED AND ADJUSTED IAW MM 79-20-03, TESTED CORRECT.

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