# SDR CALA2019092301591

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 9, 2019
- Submitted: September 23, 2019
- Operation: Air carrier
- Aircraft: [N17105](https://openairdocs.org/aircraft/N17105), registered now
- Make and model: Boeing 757224
- Aircraft serial: 27295
- Aircraft time: 95,610 hours, 22,536 cycles
- System (JASC): [5311 · Fuselage Main, Frame](https://openairdocs.org/jasc/5311)
- Part: Frame
- Part number: 146N8511
- Condition: Corroded
- Location: Fuselage
- 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/CALA2019092301591

## Discrepancy

SUPPORT TASK EA5310-07027 (AD 2017-24-10) DURING PREPARATION (CL EANING) FOUND EXFOLIATION CORROSION ON FRAME OUTTER CHORD UNDER DOOR SWITHCH FITTING AT STA 1380 BETWEEN STR 23R AND STR 24R AS MARKED 034-036. REF ENG N/R 0069975 CHECKED LIMITS TO FRAME AT STA 1380 BETWEEN S-23R AND S-24R; L=4 .5 W=3.0 D=.080. OUT OF LIMITS IAW SRM 53-00-07 FIG 101 DETAIL II. REPAIRED FRAME IAW SRM 53-00-07 REPAIR 2 FI G 201 PG201. THIS IS REPAIR IS A CATEGORY B INSPECTION THRESHOLD IS 37,500 AIRFRAME FLT CYCLES, INTERVALS OF EVERY 3000 FLT CYCLES, CURRENT CYCLES IS 22,536.

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