SDR UPS03840423

Service difficulty report · Compressor · Doug DC871F

Difficulty date: April 9, 2003
Submitted: April 14, 2003
Operation: Air carrier
Aircraft: N705UP
Make and model: Doug DC871F
Aircraft serial: 45949
Engine: Ge CFM56*
System (JASC): 7230 · Turbine Engine Compressor Section
Part: Compressor
Condition: Stalled
Location: Nr 3 Engine
Stage of operation: DE
How discovered: O
Nature of condition: R, J
Precautionary procedure: E

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

What was found

NR 3 ENGINE COMPRESSOR STALL IFSD AT FL350 WHEN POWER WAS REDUCED FROM 85 TO 77 N & CONTINUED TO STALL IN DESCENT WHEN POWER WAS REDUCED BELOW 72N NR 3 ENG SHUTDOWN IN FLIGHT DUE TO CONTINUED COMPRESSOR STALLS IN LEVEL FLIGHT WITHOUT MOVING THROTTLE. REMOVED AND REPLACED NR 3 ENG IAW MAINT TC 9071 6 STEP 1-4(82586) RIGGED VSV & VBV PER TC 9071 7(09326) BAD FROM STOCK MEC PARTS ON ORDER (99610) BOROSCOPED NR 3 HPT AND LPT BOTH LOW AND HIGH PER MM 72-00-00, CKS OK ON ALL STAGES.

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