TM 1-1520-238-10 4-66.2 Change 10 4.33 ARMAMENT INFLIGHT PROCEDURES. 4.33.1 30mm Gun System. WARNING If 300 or more rounds have been fired in the preceding ten minutes, and a stop- page occurs, personnel must remain clear of the aircraft for 30 minutes. Air- craft crewmembers should remain in the aircraft and continue positive gun con- trol. 1. CPG ARM/SAFE switches – ARM. 2. GUN select switch – As desired. 3. Crewmember desiring to fire – Establish range to target and track target with selected sight. 4. WAS switch – GUN. 5. Weapons trigger – Press, continue to fire as re- quired. 6. WAS – Deselect GUN. 4.33.2 AWS Harmonization Procedures / -55. 1. Locate target approximately 1000 meters ("50) from aircraft position. 2. Hover aircraft 100 FT ("20) above target alti- tude and maintain heading ("5 ) azimuth. 3. Sensor select switch – TV. 4. Field-of-view select switch – N or Z. 5. LSR select switch – ON. 6. Laser trigger – Press. Ensure the displayed range to target is accurate to "10 meters. 7. Laser trigger – Press. Confirm range. NOTE Harmonization burst shall be accomplished in the narrowest field of view which the CPG can observe the rounds impact (wide/nar- row). 8. Field-of-view select switch – W or N. NOTE A video recording may be used to verify im- pact area. 9. Fire one or two 10 round bursts. Note centroid of impact area. 10. Determine the appropriate sector from the ap- propriate field of view Corrector Guides (figs 4-19.1 and 4-19.2) for harmonization offset val- ues. NOTE A fraction of the offset values in a sector can be used to improve accuracy. Go to step 12 -5 5 to enter modified cor- rectors. 11. For enter modified correctors: a. DEK switch – SP1. b. Enter G on the DEK. c. The screen will display harmonization cor- rector Deltas and Totals in the following for- mat: AWS HARMONIZATION    DELTAS –MR–   AZ=+00.0  EL=+00.0     TOTALS –MR–   AZ=+00.0  EL=+00.0 d. On the DEK enter 1 to access azimuth or 2 to access elevation corrector value(s) to be changed. e. Enter corrector Delta value(s) from the Cor- rector Guides (figs 4-19.1 and 4-19.2). f. Repeat steps 1 through 11 while reducing field of view as appropriate to DTV-NFOV until center of impact is verified to be within zoom FOV gates. When FOV gates are achieved, proceed to step g. g. DEK ENTER button – Press. This will com- plete the modification.