TM 10-3930-669-20 3-9.  ENGINE AOAP VALVE REPLACEMENT. This task covers: a. Removal b. Installation INITIAL SETUP Tools and Special Tools Tool Kit, General Mechanic's: Automotive (Item 1, Appendix B) Equipment Condition Engine OFF (TM 10-3930-669-10) Parking brake applied (TM 10-3930-669-10) Equipment Condition - Continued Wheels chocked (TM 10-3930-669-10) Right-hand engine access cover open (TM 10-3930-669-10) Batteries disconnected (Para 7-48) a.    Removal.  Loosen fitting (1) and remove engine AOAP valve (2) from fitting (3). b. Installation .  Install engine AOAP valve (2) in fitting (3) and tighten fitting (1). NOTE Follow-on Maintenance: • Close right-hand engine access cover (TM 10-3930-669-10). • Connect batteries (Para 7-48). • Remove wheel chocks (TM 10-3930-669-10). END OF TASK 3-32