# SDR CALA2020062201023

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: June 22, 2020
- Submitted: June 22, 2020
- Operation: Air carrier
- Aircraft: [N78509](https://openairdocs.org/aircraft/N78509), registered now
- Make and model: Boeing 737824
- Aircraft serial: 31638
- Aircraft time: 41,278 hours, 14,435 cycles
- System (JASC): [5512 · Horizontal Stabilizer, Plate/Skin](https://openairdocs.org/jasc/5512)
- Part: Skin
- Part number: 182A4001714
- Condition: Cracked
- Location: Horizontal Stab
- 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/CALA2020062201023

## Discrepancy

RT HORIZONTAL STAB LOWER SKIN ST STA 120.30 SHOWS A CRACK FWD TO AFT APROX 1 INCH IN LENGHT. REPAIRED RH HORIZONTAL STAB LOWER SKIN AT STA 120.30 IN REF SRM 55-10-01 REPAIR 11 , INIATED A DIP TO PERFORM A CATEGORY B,INSP ECTION TRESHOLD 56.000 FLIGHT CYCLES AND THEN INTERVAL 9.000. FLIGHT CYCLES DETAIL VISUAL INSPECTION AND THEN 9.000 FLIGHT CYCLES EXTERNAL LOW FREQUENCY EDDY CURRENT . REF SRM 55-10-01 REPAIR 11 . STEP 5 TABLE 204 FIG 206 PAGE 223. INIATED A DIP TO PERFORM A CATEGORY B,INSP ECTION TRESHOLD 56.000 FLIGHT CYCLES AND THEN INTERVAL 9.000 FLIGHT CYCLES DETAIL VISUAL INSPECTION AND THEN 9.000 FLIGHT CYCLES EXTERNAL LOW FREQUENCY EDDY CURRENT . REF SRM 55-10-01 REPAIR 11 . STEP 5 TABLE 204 FIG 206 PAGE 223.

---
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.