# SDR 2007FA0000182

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 23, 2007
- Submitted: February 23, 2007
- Operation: General aviation
- Aircraft: [N577ER](https://openairdocs.org/aircraft/N577ER), registered now
- Make and model: Piper PA-44-180
- Registry model: [Piper PA-44-180](https://openairdocs.org/model/piper-pa-44-180) (OpenAirDocs)
- Aircraft serial: 4496153
- Aircraft time: 3,881 hours
- Engine: Lyc O320*
- System (JASC): [5751 · Ailerons](https://openairdocs.org/jasc/5751)
- Part: Aileron
- Part number: 86562025
- Condition: Misrepaired
- Location: Wing
- Part time: 3,881 hours
- Stage of operation: CR
- How discovered: O
- Nature of condition: W, F
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/2007FA0000182

## Discrepancy

DURING POWER OFF (CLEAN CONFIGURATION) STALLS, THE AIRCRAFT WOULD SUDDENLY BREAK LT AND IF NOT IMMEDIATELY STOPPED COULD LEAD TO A SPIN.  AFTER RERIGGING ALL FLIGHT CONTROLS, CHECKING THE AIRCRAFT ALIGNMENT WITH A LASER AND SEVERAL TEST FLIGHTS BOTH BY COMPANY PILOTS AND MFG FACTORY TEST PILOT, IT WAS DETERMINED THAT WE HAD (FAT) AILERONS ON OUR FLEET.  MFG HAS A HISTORY OF AILERON SKIN CRACKING.  (FOR US, IT HAS JUST BEEN THE RT AILERON THAT HAS HAD THE CRACKING PROBLEM.)  ONCE THE CRACK IS PAST A CERTAIN POINT YOU EITHER HAVE TO REPLACE THE AFFECTED SKIN OR REPLACE THE AILERON.  DURING SKIN REPLACEMENT, IF THE PREFORMED FACTORY SKIN IS SPREAD APART EVEN A LITTLE THE TRAILING EDGE TAKES ON A (FAT) CONDITION.

---
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.