SDR DALA2020091543075

Service difficulty report · Unknown · Boeing 737990ER

Difficulty date: September 14, 2020
Submitted: September 15, 2020
Operation: Air carrier
Aircraft: N912DU
Make and model: Boeing 737990ER
Aircraft serial: 64883
Aircraft time: 5,026 hours, 2,049 cycles
System (JASC): 2120 · Air Distribution System
Part: Unknown
Condition: Odor
Location: Cockpit
Stage of operation: TO
How discovered: O
Nature of condition: B
Precautionary procedure: O

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

What was found

DURING TAKE OFF AND IN DESCENT HAD AN OILY/DIRTY SMELL. ODOR WAS ONLY IN FLIGHT DECK. INSPECTED BLEED DUCT W/ BLACK LIGHT, NO OIL CONTAMINATION FOUND. INSPECTED NR 1 AND NR 2 ENGINE FAN AND HOT SECTION, NO OIL FOUND. R & R RECIRC FAN FILTERS, PER AMM 21-25-01. PERFORMED DUCT BURN, PER AMM 21-00-01.