- Effective
- January 14, 1991
- Model
- Parachute Canopies
- Product
- Appliance
- Amendment
- 39-6854
- Docket
- 90-NM-246-AD
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The airworthiness directive
91-02-05 GQ SECURITY PARACHUTES, INC.: Amendment 39-6854. Docket No. 90-NM-246-AD.
Applicability: Model No. 79A1684-( ) parachute canopies approved under TSO C23b.
Compliance: Required as indicated, unless previously accomplished.
To prevent the failure of parachute canopy due to deteriorating canopy material, accomplish the following:
A. Prior to further use after June 17, 1988 (the effective date of Amendment 39-5942, AD 88-05-08), remove or obliterate the TSO C23b marking from the parachute canopy and remove the canopy from service.
B. For canopies previously granted an alternate means of compliance with AD 88-05-08 and subsequently returned to service: At the next repack after the effective date of this amendment, remove the canopy from service until the requirements of paragraph B.1. and B.2. of this AD are accomplished
1. Determine that canopy fabric tensile strength is acceptable in accordance with Parachute Industry Association PublicationPIA - Technical Standard 108, Parachute Canopy Fabric Tensile Test, Non-Destructive Method, dated January 25, 1989.
2. Test the mesh (netting) material, using Bromocresol Green Solution, to determine if it is acidic. If it is acidic, the canopy cannot be returned to service unless the acidic condition is neutralized.
NOTE: Washing the canopy in detergent has been found to be effective in acid neutralization.
C. Acidity tests and fabric tensile tests conducted as an approved alternate means of compliance with AD 88-05-08 meet the requirements of paragraphs B.1. and B.2. of this AD.
D. An alternate means of compliance or adjustment of the compliance time, which provides an acceptable level of safety, may be used when approved by the Manager, Los Angeles Aircraft Certification Office (ACO), FAA, Transport Airplane Directorate.
A copy of all documents applicable to this AD may be examined at the Federal Aviation Administration (FAA), Transport Airplane Directorate, 1601 Lind Avenue S.W., Renton, Washington; or at the Los Angeles Aircraft Certification Office, 3229 East Spring Street, Long Beach, California.
Airworthiness Directive 91-02-05 supersedes AD 88-05-08, Amendment 39-5942.
This amendment (39-6854, AD 91-02-05) becomes effective on January 14, 1991.