What was found
"HUMID FLT DK" EICAS ADVISORY MESSAGE DISPLAYED. FLIGHT DECK HUMIDIFICATION SYSTEM FAILURE. REPLACED ECS CARD. YMLA13 CARD. OPS CHECKED COVERED ON DF444. REPLACED & REINSTALLED FLIGHT DECK HUMIDIFIER, OPS TESTED GOOD.
- Difficulty date
- January 11, 2012
- Submitted
- January 30, 2012
- Operation
- Air carrier
- Aircraft
- N171UA
- Make and model
- Boeing 747422
- Aircraft serial
- 24322
- Aircraft time
- 84,300 hours, 10,034 cycles
- Engine
- Pwa PW4056
- System (JASC)
- 2170 · Humidity Control System
- Part
- Circuit Card
- Part number
- 285U0036211
- Part serial
- 58
- Condition
- Failed
- Stage of operation
- NR
- How discovered
- O
- Nature of condition
- J
- Precautionary procedure
- H
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.