COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY

SCHEDULE OF AIRWORTHINESS DIRECTIVES

Cessna 500 (Citation) Series Aeroplanes

AD/CESSNA 500/18 Main Gear Actuator to Strut

Attach Stud - Inspection

Applicability: All Model 500 with unit number 0466 through 0672. Document:  Cessna Citation Alert Service Letter SLA 32-34.

11/83

Compliance: 1. Before further flight after 11th October, 1983 and prior to each flight thereafter.

Visually inspect each main landing gear actuator attach stud (taper pin) retaining nut and cotter pin (aft side of cylinder boss) for security.

2.    Within 25 hours or 30 days time in service after 11th October, 1983 whichever  occurs first, perform one of the following:

(a)     If Service Bulletin SB32-37 is available comply with that service bulletin; or

(b)     If Service Bulletin SB32-37 is not available : Perform the inspection detailed in the requirement document.

3.    Within 90 days after 11th October, 1983 - Comply with Service Bulletin SB32-37 if not already accomplished.

Note 1: Compliance with SB32-37 results in discontinuance of the inspection requirements.

Note 2: For aircraft maintained in accordance with ANO 100.5.1 the inspection detailed at Para. 1 above shall be entered on the maintenance release as maintenance required. That inspection may be performed by the pilot in command, in which case certification is not required. In all other cases certification may be made on the maintenance release. This inspection may also be performed and certified by an Licensed Aircraft Maintenance Engineer.

Background:  Reports have been received of failure of the main gear attach stud P/No. 6541204-3 at the thread relief on the small end. Failure can result in loss of the attach stud from the main gear trunnion which could result in gear collapse.