# SDR UPS04441767

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 6, 2004
- Submitted: January 21, 2004
- Operation: Air carrier
- Aircraft: N677UP
- Make and model: Boeing 747123F
- Aircraft serial: 20391
- Aircraft time: 91,214 hours, 22,751 cycles
- System (JASC): [5753 · Trailing Edge Flaps](https://openairdocs.org/jasc/5753)
- Part: Rib
- Part number: 65B078455
- Condition: Corroded
- Location: Lt Wing Te Flap
- Stage of operation: IN
- How discovered: V
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/UPS04441767

## Discrepancy

LEFT WING L/E NR 2 VC FLAP O/B ROTARY ACTUATOR SUPPORT RIB MOUNTING HOLE NR 2, 3, 4 AND NR 1 BORE FOUND SURFACE CORRODED (LOOKING O/B).  LEFT WING L/E NR 2 V/C FLAP O/B ROTARY ACTUATOR SUPPORT RIB REPLACED PER SRM 51-10-01 PG 8.  NR 2 V/C FLAP REF MM 27-81-02 RIGGING AND OPERATION CHECK CARRIED OUT PER MM 27-81-00.  CORROSION BLEND OUT FINAL SIZE 0.434 INCH DIA OUT HOLES NR 2 TO NR 4 OLES 1453 .25.

---
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, except the copies of manufacturers’ service documents, which belong to their rights holders.