What was found
HYDRAULIC QUANTITY LOW 1, HYDRAULIC PRESSURE ENGINE 1, HYDRAULIC PRESSURE SYSTEM EICAS MESSAGES. REMOVED AND REPLACED #1 ENGINE DRAIN PUMP IAW B747-400 AMM 29-11-05. PERFORMED TEST 3 IAW B747-400 AMM 71-00-00. ALL CHECKS GOOD.
- Difficulty date
- June 10, 2020
- Submitted
- June 15, 2020
- Operation
- Air carrier
- Aircraft
- N401KZ
- Make and model
- Boeing 747481F
- Aircraft serial
- 34016
- Aircraft time
- 50,232 hours, 10,110 cycles
- System (JASC)
- 2913 · Hydraulic Pump (Electric/Engine), Main
- Part
- Pump
- Part number
- 3508806
- Part serial
- MX353477
- Condition
- Cracked
- Location
- Hyd System
- Stage of operation
- CR
- How discovered
- 9
- Nature of condition
- J
- Precautionary procedure
- K
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.