What was found
RTFL DUE TO ALL 4 EFIS SCREENS BLINKING. REMOVED AND CLEANED EFIS FILTER, FANS AND CHECK VALVES . DISCONNECTED DUCTS TO FORWARD OF FLOW SENSOR TO CHECK FOR OBSTRUCTIONS, ALL OK. REPLACED CONTROL RELAY R401, OPERATES NORMAL.
- Difficulty date
- May 23, 2007
- Submitted
- May 24, 2007
- Operation
- Air carrier
- Aircraft
- N930UA
- Make and model
- Boeing 737522
- Aircraft serial
- 26655
- Aircraft time
- 40,813 hours, 29,537 cycles
- Engine
- Cfmint CFM563C1
- System (JASC)
- 3425 · Integrated Flight System
- Part
- Relay
- Condition
- Malfunctioned
- Location
- Efis
- Stage of operation
- CL
- How discovered
- O
- Nature of condition
- O
- Precautionary procedure
- A
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.