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SDR VNAA2009111300001

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Service difficulty report · Carbon Seal · Cndair CL6002B19

FAA SDR system

Difficulty date
November 5, 2009
Submitted
November 13, 2009
Operation
Air carrier
Aircraft
N250PS
Make and model
Cndair CL6002B19
Aircraft serial
7929
Aircraft time
13,098 hours, 13,809 cycles
Engine
Ge CF343B1
Engine time
13,098 hours, 13,809 cycles
System (JASC)
7261 · Turbine Engine Oil System
Part
Carbon Seal
Condition
Leaking
Location
Lt Engine
Stage of operation
CL
How discovered
O
Nature of condition
K, J
Precautionary procedure
A

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

What was found

CREW REPORTED A LEFT ENGINE OIL PRESSURE FLUCTUATION OF 20 TO 30 PSI AFTER TAKEOFF. CREW FOLLOWED QRH AND RETURNED TO DCA. AIRCRAFT LANDED WITHOUT INCIDENT. MAINTENANCE INSPECTED AIRCRAFT USING AIRCRAFT MAINTENANCE MANUAL, CONFIRMED OIL LEAKING FROM LT ENGINE AND REMOVED AND REPLACED CARBON SEAL ASSEMBLIES / MATING RINGS ON ACCESSORY DRIVE GEARBOX (AGB) FOR AIR TURBINE STARTER (ATS), ENGINE DRIVEN PUMP (EDP) AND INTEGRATED DRIVE GENERATOR (IDG). C-SUMP OIL SUPPLY TUBE PACKINGS AT 6 O’CLOCK POSITION WERE ALSO REMOVED AND REPLACED. MAINTENANCE PERFORMED CHECKS USING AIRCRAFT MAINTENANCE MANUAL. NO FURTHER DEFECTS WERE NOTED AND SATISFACTORY OCF WAS PERFORMED. AIRCRAFT WAS RELEASED FOR SERVICE.