scope:

The complete requirements for procuring the air turbine starter described herein shall consist of this document and the issue in effect of Specification MIL-S-19557C (AS).

APPLICABLE PARAGRAPH OF SPECIFICATION 3.8.1 Envelope: Figure 1 3.7 Wt. Max (Lb): 25 6.3.1 Aircraft Model: A-4 4.5.16 Engine Model: J-52 3.8.2.1 Quick-Attach-Detach Mounting: Yes 3.8.2.2 Engine Accessory Drive: AND20002, Type XIIS 3.8.3 Air Inlet and Exhaust Connections: Figure 1 3.5.5 Rotation Viewed from Anti-Drive End: Clockwise 3.9.1 3.3.2 Exposure Temperature Range (°F): −100 to +275 3.3.2 Ambient Temperature Operating Range (°F): −65 to +160 3.3.2.3 Control Valve: 4.5.1.1 Opening Rate, Max: 22 psig per sec for the first .1 sec 4.5.6 Closing Time, Max: 0.5 sec Navy Model: ATSCV-1 3.5.1 Rated Conditions: Output Drive Speed (RPM): 1100 Output Drive Torque, Min (Lb-Ft): 195 Airflow, Max (Lb per Min): 90 Air Inlet Total Pressure (In.Hg A): 100 Air Inlet Total Temperature (°F): 350 3.5.1 Cutout Speed(RPM): 3450 ±250 3.5.7 3.5.7 Automatic Shutoff Control: Either turbine wheel speed or output drive speed may be sensed for control operation.

APPLICABLE PARAGRAPH OF SPECIFICATION 3.5.8 Altitude: The starter shall be capable of meeting rated speed and output torque at 8000-ft altitude at rated inlet conditions. The starter shall not be damaged when subjected to 75,000-ft altitude in the overrunning mode of operation. 3.5.9 Attitude: The starter shall be capable of meeting the operational requirements of this specification when the starter centerline, taken through the output shaft, is in any position within 10 degrees of the horizontal position, unless specified otherwise on this Specification Sheet. 4.5.4 Initial Calibration: Drive Torque Drive Speed Drive Speed (Lb-Ft) (RPM) Condition 230 Min, 385 Max 0 Stall 195 Min --- 1100 Rated 16 Min --- 3200 Min Cutout Airflow, Max Drive Speed Drive Speed (Lb per min) (RPM) Condition 90 0 Stall 4.5.5 No-Load Operation: Time (Sec): 60 Minimum Drive Speed (RPM): 3800 3.3.5 Endurance Test: Number of cycles: 1200; no lubricant 4.5.6 addition or change permitted. Each cycle shall consist of three consecutive phases as follows: Test Stand Phase A - Phase B- Phase C - Rotor Polar Acceleration At Following Conditions Acceleration Moment of Drive Drive Drive Time Drive Inertia Speed Time Speed Torque _____ Speed Time RPM Max RPM Lb-FT Min Lb-Ft² ±50 Sec ±50 (Min) Sec RPM Sec _____________________________________________________________________________________________________________________________________________ 525 1020 8 1020 200 10 2250 12 APPLICABLE PARAGRAPH OF SPECIFICATION Note: The above values do not allow for flywheel windage losses, test stand drag, or inertia of the starter. In order to determine compliance with this specification, the test results corrected accordingly. If the acceleration specified for Phase C is not developed because of test stand drag torque, the test stand inertia load may be reduced or external power may be applied to assist acceleration to cutout speed. Time from end of Phase C to starter cutout shall not exceed 15 seconds. 4.5.8 Rated Torque Calibration: Minimum Output Drive Speed (RPM): 1100 Airflow, Max (Lb per Min): 90 3.3.5 Overrunning: The starter output drive shall be driven 4.5.9 for 1000 hours in a clockwise direction (viewed from the anti-output shaft end) in accordance with the following tabulation: Starter Drive Overrunning Speed RPM ±200 Phase A Phase B Phase C 750 Hrs 200 Hrs 50 Hrs 6800 7000 4360 4.5.10 Extreme Temperature Operation: Inlet Air Conditions _____________________________________________________________________________________ Total Press. Total Ambient In. Hg A ±0.5 Temp (°F) Temp (°F) 140 260 −65 90 445 +160 4.5.11 Consecutive Cyclical Operation: No. of cycles: 5 APPLICABLE PARAGRAPH OF SPECIFICATION 4.5.12 Sustained Motoring: Time (Minutes): 2 4.5.13 Vibration: MIL-STD-810., Method 514, Procedure I, Curve F (Parts 1, 2, and 3). 4.5.15.1 Slip Clutch Torque, Max (Lb-Ft): 640 4.5.15.2 Shear Section Strength, Max (Lb-Ft): 640 4.5.18 Containment Tests: Not applicable