AD 98-15-18

Applies to

The following airplane models, all serial numbers, certificated in any category, that are equipped with part number (P/N) 2079E (or FAA-approved equivalent part number) rear wing lift struts or P/N 2080E (or FAA-approved equivalent part number) front wing lift struts: Bee Dee M-4 M-4C M-4S M-4T M-4-180C M-4-180S M-4-180T M-4-210 M-4-210C M-4-210S M-4-210T M-4-220 M-4-220C M-4-220S M-4-220T M-5-180C M-5-200 M-5-210C M-5-210TC M-5-220C M-5-235C M-6-180 M-6-235 M-7-235 MX-7-235 MX-7-180 MX-7-420 MXT-7-180 MT-7-235 M-8-235 MX-7-160 MXT-7-160 MX-7-180A MXT-7-180A MX-7-180B MXT-7-420 M-7-235B M-7-235A M-7-235C

The FAA's summary

This amendment supersedes Airworthiness Directive (AD) 95-26- 18, which currently requires inspecting (one-time) certain wing lift struts for internal corrosion on certain Maule Aerospace Technology Corp. (Maule) M-4, M-5, M-6, M-7, MX-7, and MXT-7 series airplanes and Models MT-7-235 and M-8-235 airplanes, and replacing any wing lift strut where corrosion is found. That AD was the result of an accident where the wing separated from one of the affected airplanes. This AD retains the initial inspection and possible replacement requirements of AD 95-26-18, requires the inspections to be repetitive, and provides the option of using ultrasonic procedures to accomplish the inspection requirements. The actions specified by this AD are intended to prevent failure of the wing lift struts caused by corrosion damage, which could eventually result in the wing separating from the airplane.

Filed under

The aircraft, engines and makers this AD names, by the model designations in its text. A model listed here may still be outside the AD's serial ranges.

Official sources

• The Federal Register document · document 98-19328, the legal text
• FAA Dynamic Regulatory System (DRS) · search 98-15-18 for its current status and any corrections