# SDR CALA2020032000615

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 9, 2020
- Submitted: March 20, 2020
- Operation: Air carrier
- Aircraft: [N78438](https://openairdocs.org/aircraft/N78438), registered now
- Make and model: Boeing 737924ER
- Aircraft serial: 33533
- Aircraft time: 35,670 hours, 12,424 cycles
- System (JASC): [5512 · Horizontal Stabilizer, Plate/Skin](https://openairdocs.org/jasc/5512)
- Part: Skin
- Part number: POSJL2352
- Condition: Damaged
- Location: Lt Horiz Stab
- Stage of operation: IN
- How discovered: O
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/CALA2020032000615

## Discrepancy

(EA 5510-01843 REV H OP 001) DURING C-SCAN FOUND INDICATION ON L /H STAIBILIZER LOWER AFT SKIN BETWEEN RIBS STA 120.30-129.50. REF BY PEMCO NR 2708N274 REPAIRED LH STAB LOWER AFT SKIN BETWEEN RIBS STA 120.30-129.50 IAW B737-900ER SRM 55-10-01, REPAIR 11, CAT B REPAIR, INSP THRESHOLD AT 56000FC, REPEAT INTERVALS 9000FC FOR DVI & LFEC PER 737 NDT PART 6, 51-00-26, FIG 1 TOMC APPROVED DIP CARRY.  TPA MX BASE PERFORMED HORIZONTAL STAB LWR SKIN EXTERNAL REPAIR 11 PER SRM 55-10-01.  PLACED ON DIP TO PERFORM DVI AND LFEC AT INTERVALS OF 9000 FC WITH AN INSPECTION THRESHOLD OF 56000 TOTAL FLT CYCLES REF SRM 55-10-01, REPAIR 11 CAT B REPAIR, TABLE 204, PG. 223. TOMC-APPROVAL FROM SC1ELBYC COMMENT INSPECTIONS CREATED BY AUTODIP PENDING AIRCRAFT RECORDS AUDIT & UPDATE.

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