# SDR UPS04243204

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 13, 2004
- Submitted: September 29, 2004
- Operation: Air carrier
- Aircraft: N938UP
- Make and model: Boeing 727173C
- Aircraft serial: 19506
- Aircraft time: 53,145 hours, 34,107 cycles
- System (JASC): [5754 · Leading Edge Devices](https://openairdocs.org/jasc/5754)
- Part: Skin
- Condition: Corroded
- Location: Nr4 Krueger Flap
- Stage of operation: IN
- How discovered: 9
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/UPS04243204

## Discrepancy

INSPECTION TYPE:C, NR 4 KRUEGER FLAP HAS CORROSION ON INNER SURFACE BELOW ACTUATOR ATTACH AREA.  CORROSION REMOVED AND FOUND TO BE BEYOND LIMITS IAW SRM 57-50-01.  L/ED GE KRUEGER FLAP REMOVED IAW AMM 27-81-01 STEP 2.  ACTUATOR ROD END BEARING FOUND TO BE WORN AND CORRODED.  ACTUATOR REMOVED IAW AMM 27-81-22 FLAP ACTUATOR REPLACED IAW AMM 27-81-22.  KRUEGER FLAP INSTALLED IAW AMM 27-81-01.  ADJUSTMENT TEST CARRIED OUT IAW AMM 27-81-01.

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