AD 96-12-23 Wing Stall Fence
July 31, 1996
This AD applies to all 150s, A150s, 152s, and A152s that have been modified with the Bush Conversions STOL kit.
This action requires measuring the wing stall fence for maximum height and installing a smaller fence if the fence exceeds the maximum height of 1.28 inches. An accident of a Cessna Model 152 airplane where the STOL kit adversely affected the airplane’s stall characteristics prompted this action. The actions specified by this AD are intended to prevent the airplane from entering a stall condition because of improper wing stall fence height, which could result in loss of control of the airplane.
96-12-23 THE CESSNA AIRCRAFT COMPANY: Amendment 39-9666; Docket No. 95-CE- 14-AD.
Applicability: The following airplane models (all serial numbers), certificated in any category, that have a Bush Conversions, Inc., Short Takeoff and Landing (STOL) kit incorporated in accordance with Supplemental Type Certificate (STC) SA1371SW:
NOTE 1: This AD applies to each airplane identified in the preceding applicability provision, regardless of whether it has been modified, altered, or repaired in the area subject to the requirements of this AD. For airplanes that have been modified, altered, or repaired so that the performance of the requirements of this AD is affected, the owner/operator must request approval for an alternative method of compliance in accordance with paragraph (d) of this AD. The request should include an assessment of the effect of the modification, alteration, or repair on the unsafe condition addressed by this AD; and, if the unsafe condition has not been eliminated, the request should include specific proposed actions to address it.
Compliance: Required within the next 100 hours time-in-service after the effective date of this AD, unless already accomplished.
To prevent the airplane operator from entering a stall condition because of improper wing stall fence height, which, if not detected and corrected, could result in loss of control of the airplane, accomplish the following:
(a) Measure the height of the wing stall fence at its trailing edge to ensure that the height does not exceed 1.28 inches. (See Figure 1 of this AD).
(b) If the wing stall fence height exceeds 1.28 inches, prior to further flight, install a smaller fence in accordance with instructions obtained from the Wichita Aircraft Certification Office (ACO), FAA, 1801 Airport Road, Mid-Continent Airport, Wichita, Kansas 67209.
NOTE 2: Mid-America Drawing No. 1001 (part of STC SA1371SW) is included as Figure 1 of this AD for reference purposes.
(c) Special flight permits may be issued in accordance with sections 21.197 and 21.199 of the Federal Aviation Regulations (14 CFR 21.197 and 21.199) to operate the airplane to a location where the requirements of this AD can be accomplished.
(d) An alternative method of compliance or adjustment of the compliance times that provides an equivalent level of safety may be approved by the Manager, Wichita ACO, 801 Airport Road, Mid-Continent Airport, Wichita, Kansas 67209. The request shall be forwarded through an appropriate FAA Maintenance Inspector, who may add comments and then send it to the Manager, Wichita ACO.
NOTE 3: Information concerning the existence of approved alternative methods of compliance with this AD, if any, may be obtained from the Wichita ACO.
(e) Figure 1 of this AD may be obtained from the Wichita ACO at the address specified in paragraph (d) of this AD; and may be examined at the FAA, Central Region, Office of the Assistant Chief Counsel, Room 1558, 601 E. 12th Street, Kansas City, Missouri 64106.
(f) This amendment becomes effective on July 31, 1996.