ATA 05

Horizontal Stabilizer:
AD 89-12-08 horiz. stab hinge inspection is a requirement of EACH 200 hour airframe inspection if you do not have the titanium fitting even though the AD has a 300 hour requirement. AD 96-24-11 aileron rod wear inspection is a requirement of EACH 400 hour airframe inspection even though the AD has a 600 hour requirement. Make sure these are recorded in the logbooks.

ATA 55

Horizontal Stabilizer Aft Fitting inspection: Worthington Aviation has requested and has received an Alternate Method Of Compliance (AMOC) for Airworthiness Directive (AD) 89-12-08. This AD concerns the inspection criteria for the horizontal stabilizer splice (aluminum). The AD states, (paragraph C) “if cracks are found, replace the splice fitting prior to further flight, in accordance with the following IAI Service Bulletin entitled “Horizontal Stabilizer Assembly –Inspection, Repair and Improvement (AFC 2037), as appropriate”. The Service Bulletins listed do no reference the replacement of the fitting with the titanium fitting (453005-509) hence the continued inspection criteria remains in the body of the AD (paragraph B).
Since then IAI has come out with the -509 titanium fitting and had changed the AMM Ch 5 to reflect the changed times for inspection for this part.
This AMOC references the -509 titanium fitting and the changed inspection times for this fitting.

Please refer to the IAI AMM 5-20-06 pg 202
Contact Worthington for a copy of the AMOC for your records (ANM-116-08-212)

ATA 5/55

Horizontal Stabilizer
Airworthiness Directive (AD) 89-12-08 has a 300-hr. horizontal stabilizer inspection requirement, and AD 96-24-11 has a 600-hr. aileron push-pull tube/guider roller inspection requirement. However, operators need to be aware that Chapter 5 of the Maintenance Manual requires them to be accomplished at 200-hr. and 400-hr. intervals, respectively. Please make sure that your maintenance facility is aware of this and makes the proper logbook entries.