SDR DALA2017031602154

Service difficulty report · Unknown · Doug MD9030

Difficulty date: March 12, 2017
Submitted: March 17, 2017
Operation: Air carrier
Aircraft: N925DN
Make and model: Doug MD9030
Aircraft serial: 53587
Aircraft time: 43,860 hours, 29,183 cycles
System (JASC): 4900 · Airborne Auxiliary Power Unit (APU) System
Part: Unknown
Condition: Odor
Location: Apu
Stage of operation: CL
How discovered: O
Nature of condition: B
Precautionary procedure: A

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

What was found

PERFORMED AN AIR TURN BACK DUE TO A STRONG ACRID ODOR AFTER TAKE OFF. DECLARED EMERGENCY. MAINTENANCE FOUND APU INLET DOOR CRACKED. CLEANED AND REPLACED APU INLET DOOR ASSEMBLY. NO ODOR FROM ENGINES, HOWEVER, ODOR WHEN RUNNING APU. PERFORMED FULL DUCT BURNOUT AND REPLACED COALESCER BAGS. NO FURTHER SMOKE OR ODOR.

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