pdf Gfa ad 358 issue 2 Popular

INSPECTION, RELOCATION AND MAINTENANCE PROCEDURES OF TOW RELEASE HANDLES

Applicable to the Grob Twin Astir and Twin Astir Trainer, serial numbers 3000 to 3291 (Trainer with supplement T), Grob G 103 Twin II and G 103 A Twin II Acro, serial numbers 3501 to 3878 (Acro with supplement K) and Grob Single seat Astir's, all types, all serial numbers. This AD was originally issued in 1989 and requested the movement of all single/front seat tow release knobs as well as the rear seat knob movement as required by Grob Technical Bulletin No. 315-22. The movement of the single/front seat knobs has resulted in several operational problems. These are: A) Single seat Astir's. The cable from the yellow knob may catch on the rear edge of the cable pulley keeper. This may jam the cable, and the wheel brake lever on the front of the control column may hook in behind the yellow knob when the control column is pushed full forward, full left. This could result in unintentional release of the tow line, and B) All affected types (front seat). The raised knob may be shielded by the control column when the control column is in the full forward, full left position. The shielding is sufficient to restrict access to the yellow knob until the control column is moved back towards centre. Grob Service Bulletin No. 315-32 and Repair Instruction No. 315-32 refers.