# Proposed AD 97-CE-139-AD: Aerostar Aircraft Corporation PA-60-600 and PA-60-700 Series Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 98-24-29
- Action: Notice of proposed rulemaking (NPRM).
- Published: August 21, 1998, 63 FR 44818
- Comments due: October 13, 1998
- Became: [AD 98-24-29](https://openairdocs.org/ad/98-24-29)
- Docket: 97-CE-139-AD
- FR document: 98-22542
- Official PDF: https://openairdocs.org/files/sha256/d5/b1/d5b105867e7f434644ec565cf26bf9aa9e3a6d384c4f7d6078a4ad3436edefb7 (from https://www.govinfo.gov/content/pkg/FR-1998-08-21/pdf/98-22542.pdf)
- Federal Register: https://www.federalregister.gov/documents/1998/08/21/98-22542/airworthiness-directives-aerostar-aircraft-corporation-pa-60-600-and-pa-60-700-series-airplanes
- Page: https://openairdocs.org/proposed/97-CE-139-AD

## Summary

This document proposes to adopt a new airworthiness directive (AD) that would apply to all Aerostar Aircraft Corporation (Aerostar) PA-60-600 and PA-60-700 series airplanes. The proposed AD would require repetitively inspecting the forward face of each wing's 55-percent upper spar cap for cracks above the main landing gear fitting in the top of the wheel well, and replacing or repairing any cracked upper spar cap. The proposed AD is the result of reports of spanwise cracks in the area above the main landing gear attachment on two of the affected airplanes. The actions specified by the proposed AD are intended to detect and correct fatigue cracking of the wing upper spar cap, which could result in structural failure of the wing spar to the point of failure with consequent loss of control of the airplane.

## Notices in this docket

- Aug 21, 1998: Notice of proposed rulemaking (NPRM). (first notice), FR document 98-22542, comments due Oct 13, 1998 (https://www.federalregister.gov/documents/1998/08/21/98-22542/airworthiness-directives-aerostar-aircraft-corporation-pa-60-600-and-pa-60-700-series-airplanes)

---
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.