# SDR EIAA20090057SUP

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 11, 2009
- Submitted: May 14, 2009
- Operation: Air carrier
- Aircraft: [N471EV](https://openairdocs.org/aircraft/N471EV), registered now
- Make and model: Boeing 747273C
- Aircraft serial: 20651
- Aircraft time: 1,005,748 hours
- System (JASC): [2170 · Humidity Control System](https://openairdocs.org/jasc/2170)
- Part: Coalescer Bag
- Condition: Contaminated
- Location: Nr 1 Acm
- Stage of operation: CR
- How discovered: O
- Nature of condition: B
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/EIAA20090057SUP

## Discrepancy

DURING HIGH POWER SETTING (1.45 AND ABOVE) A SWEET ODOR OF OIL ENTERS AIRCRAFT.  SIGNS OF OIL LEAK AT NR 1 PACK ACM AND DUCTING, DEACTIVATED NR 1 PACK, DEFERRED AS PER DDPG 21-1-2A.  TRANSFERRED TO DMI 008, AS PER MEL 21-1-2C, CAT D, DUE DATE 9-8-9, INSTALLED PLACARD.  REACTIVATED NR 1 PACK IAW MM 21-51-00.  REMOVED AND REPLACED NR 1 ACM COALESCER BAG IAW MM 21-51-05.  OPERATED NR 1 PACK IAW 21-51-00, OPS CHECK NORMAL, DMI CLEARED, PLACARDS REMOVED.

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