# AD 81-06-08: Lower Fuselage Attachment Tab - Type: Airworthiness directive - Status: Current - Products: Piper PA-18-150 - Effective: November 19, 1981 - Published: November 16, 1981 - Issued: November 4, 1981 - Superseded by: Nothing supersedes this AD - Product type: Aircraft, Small airplane - Amendment: 39-4264 - Registered aircraft: 2,135 may be affected, by airframe or engine model (OpenAirDocs) - FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/D42490FEF9685795862569A6005CDBE5.0001 - DRS record last changed: November 21, 2025 - Page: https://openairdocs.org/ad/81-06-08 ## The airworthiness directive 81-06-08 PIPER: Amendment 39-4264. Applies to Piper PA-18-150 Airplanes, S/N 18- 8602 thru 18-8109013, certificated in all categories. Compliance required as indicated. To prevent failure of the lower fuselage attachment tab which connects the lower horizontal stabilizer brace wire to the fuselage, accomplish the following: (a) Within the next 10 hours in service after the effective date of this AD, unless already accomplished, conduct a visual inspection of the lower fuselage attachment tab, Piper P/N 80292-15, in the area of the welds for cracks. If cracks are found, install the tail brace wire support in accordance with the Instructions Section of Piper Service Bulletin 706 dated February 23, 1981, or approved alternate method, prior to further flight. If no cracks are found, install the tail brace wire support in accordance with (b) or (c), as appropriate. (b) For airplanes with less than 500 hours in service on the effective date of this AD, within the next 10 hours in service, unless already accomplished, install the tail brace wire support in accordance with the Instructions Section of Piper Service Bulletin 706 dated February 23, 1981. (c) For airplanes with 500 hours or more time in service on the effective date of this AD, within the next 100 hours in service, unless already accomplished, install the tail brace wire support in accordance with the Instructions Section of Piper Service Bulletin 706 dated February 23, 1981. (d) Report findings of cracked parts to the Chief, Engineering and Manufacturing Branch, FAA, Eastern Region, within five days of the inspection; include the time on the part and aircraft serial number. (Reporting approved by the Office of Management and Budget under OMB No. 04-R0174.) (e) Alternative inspections, alterations, or repairs which provide an equivalent level of safety may be used when approved by the Chief, Engineering and Manufacturing Branch, FAA, Eastern Region. (f) Upon submission of substantiating data by an owner or operator through an FAA Maintenance Inspector, the Chief, Engineering and Manufacturing Branch, FAA, Eastern Region may adjust the compliance times specified in this AD. NOTE: Retention of original tab fitting P/N 80292-15 on the airplane is optional. This amendment is effective November 19, 1981, for all persons except those to whom it was made effective immediately by airmail letter dated March 13, 1981. ## Affected data sheets (1) (OpenAirDocs) The type certificate data sheets whose models the AD names. - [TCDS 1A2](https://openairdocs.org/tcds/1A2): Piper Aircraft Inc.; names 1 of 18 models: PA-18-150 ## Registered aircraft it may apply to (OpenAirDocs) Matched by airframe and engine model; the AD's applicability may narrow it by serial number, part number or equipment. - Aircraft: 2,135 (2,135 by airframe model, 0 by engine model) - Makers: Piper 2,065, Piper/Cub Crafters 46, Cub Crafters 16, Cubs Unlimited/Piper 1, Kurt Lepping 1, Piper/Gerbi Charles R 1, Piper/Johnson C D 1, Piper/Meyer Alfred R 1, Piper/Snyder Matthew A 1, Piper/Sorensen 1 Models with the most aircraft: - [Piper PA-18-150](https://openairdocs.org/model/piper-pa-18-150): 2,065 aircraft (airframe model) - [Piper/Cub Crafters PA-18-150](https://openairdocs.org/model/piper-cub-crafters-pa-18-150): 46 aircraft (airframe model) - [Cub Crafters PA18-150](https://openairdocs.org/model/cub-crafters-pa18-150): 16 aircraft (airframe model) - [Cubs Unlimited/Piper PA 18-150](https://openairdocs.org/model/cubs-unlimited-piper-pa-18-150): 1 aircraft (airframe model) - [Piper/Sorensen PA-18-150](https://openairdocs.org/model/piper-sorensen-pa-18-150): 1 aircraft (airframe model) - [Piper/White Theordore F PA-18-150](https://openairdocs.org/model/piper-white-theordore-f-pa-18-150): 1 aircraft (airframe model) - [Piper/Johnson C D PA-18 150](https://openairdocs.org/model/piper-johnson-c-d-pa-18-150): 1 aircraft (airframe model) - [Piper/Meyer Alfred R PA 18-150](https://openairdocs.org/model/piper-meyer-alfred-r-pa-18-150): 1 aircraft (airframe model) - [Kurt Lepping PA-18-150](https://openairdocs.org/model/kurt-lepping-pa-18-150): 1 aircraft (airframe model) - [Piper/Snyder Matthew A PA-18-150](https://openairdocs.org/model/piper-snyder-matthew-a-pa-18-150): 1 aircraft (airframe model) - [Piper/Gerbi Charles R PA 18-150](https://openairdocs.org/model/piper-gerbi-charles-r-pa-18-150): 1 aircraft (airframe model) All 12 models: https://openairdocs.org/ad/81-06-08/models.md Every aircraft: https://openairdocs.org/ad/81-06-08/aircraft.md Its text cites no advisory circulars or STCs. --- 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.