# SDR KCSA2026082650

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 26, 2026
- Submitted: August 31, 2026
- Operation: Air carrier
- Aircraft: [N712CK](https://openairdocs.org/aircraft/N712CK), registered now
- Make and model: Boeing 747-4B5F
- Registry model: [Boeing 747-4B5F](https://openairdocs.org/model/boeing-747-4b5f) (OpenAirDocs)
- Aircraft serial: 26414
- Aircraft time: 95,990 hours, 17,030 cycles
- System (JASC): [2820 · Aircraft Fuel Distribution System](https://openairdocs.org/jasc/2820)
- Part: Scavenge Tube
- Part number: 343U102335
- Condition: Leaking
- Location: Fuel Sys
- Stage of operation: CR
- How discovered: O
- Nature of condition: K, J
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/KCSA2026082650

## Discrepancy

FUEL IMBALANCE MAIN 2 MAIN 3. MAIN 2 13,000LBS MORE THAN MAIN 3. RAN QRH.   PERFORMED M2/M3 FUEL MANIFOLD LEAK TEST IAW B747 FIM 28-20 TASK SUPPORT. M2/M3 FUEL MANIFOLD LEAK TEST NOTED 200LBS/4 MIN LEFT CUT MANIFOLD LEAK TEST NOTED 100LBS/4 MIN M2 REFUEL/JETT LEAK TEST NOTED 100LBS/3 MIN. PERFORMED FUEL CMD OVRD M3 STATUS CHECKS IAW FIM 28-31-00-872. ALL CHECKS GOOD, FUEL MANIFOLD LEAKS NOTED ABOVE ARE THE ONLY DEFECTS NOTED.  FUEL MANIFOLD LEAK RATE OUT OF LIMITS. REMOVED & INSTALLED NEW SERVICEABLE C/T LT SIDE SCAVENGE FUEL LINE IAW AMM 28-15-03. OPS CHECKS GOOD IAW AMM 28-15-00. NO DEFECTS NOTED.

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.