What was found
AIR TURNBACK, DURING CLIMB, BOTH LEFT AND RIGHT IRS WENT TO DC FAIL C/W QRH PROCEDURES. NO HELP. REMOVED AND REPLACED RELAYS R-1, R-4, R-344. RAN ACFT ENGS AND APU. ALL INDICATIONS NORMAL PER MM.
- Difficulty date
- August 5, 1999
- Submitted
- March 26, 2000
- Operation
- Air carrier
- Aircraft
- N355SW
- Make and model
- Boeing 7373H4
- Aircraft serial
- 25250
- System (JASC)
- 3420 · Attitude and Direction Data System
- Part
- Relay
- Part number
- 6973627
- Condition
- Failed
- Location
- Cabin
- Stage of operation
- IN
- Nature of condition
- O
- Precautionary procedure
- K
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.