1、- -_ MIL-R-24OllA(WP) .i5 March i965 SUPERSEDING MIL-R-24011 (WEP) 15 March i964 MILITARY SPECIJ?ICA!TION RADAR ALTSlCEFEB WARNING SET AN/AFQ-107 (*) This specification has been approved by the Bureau of Naval Weapons, Department of the Navy. 1. SCOPE 1.1 Scope - The equipment covered by this specif
2、ication shall provide an aural warning signal to energize the pilots and copilots headsets and a visual warning signal to illuminate a visual warning feature in accordance with the operational requirements speclf ied herein. 1.2 Classification - The Radar Altimeter Warning Set shall consist of a sin
3、gle unit designated AN/Ap Bases I Mounting; and Mounts, Vibration 1-.4682 Electron Tubes and Transistors, Choice and : (For use with Electronic Equipment in Aircraft) Application of - . - -if .DOUMVPENT COnPiNs 22, PAGE$, 1 FSC 584 _. .-nient interchangeability shall exist between units and all repl
4、aceable - assemblies, subassemblies, nd parer between -1-3 and +29 volts when the altimeter is reliable and less than one volt when the altimeter is unreliable. than 5,000 ohms. 3.4.4.3 signal is a IX voltage of 3-25 f 4 volts when the ASE coupler is engaged (“ON“ condition) and zero volts when the
5、ASE coupler is disengaged (“OFIF condition). than 20,000 ohms. eter power failure input signal voltage is i05 - 122 V RMS,. 380 - 420 cps in the “ON“ condition and zero volts in the impedance presented to this signai shall be greater than 30,000 ohms. Weel Dam and Locked Input Signals - The wheel da
6、m and locked input signal voltage is aircraft DC growid when the wheel is dam and locked and is between + 4.5 and f 29 volts when the wheel is not down and locked. than 10,000 ohms. 3.4.4.2 Reliability Input Signal -.The reliability input signal The input impedance presented to this signal shall be
7、greater ASE Ehgagement Input Signal - The ASE engagement input The input impedance presented to this signal shall be greater 3.4.4.4 Altimeter Indicator Power Failure Input Signal - The altim; condition. The input 3.4.4.5 The input impedance presented to each signal shall be greater Provided by IHSN
8、ot for ResaleNo reproduction or networking permitted without license from IHS-,-,-3.4.4.6 Test Command Input Signal - The test command input signal will be +25 2 4 V DC when the- “press to test“ switch is depressed and open circuited at all other times. shall be greater than 200 oms. The input imped
9、ance presented to this signal 3.4.4.7 Pressure Altitude Input Signal - The equipment shall contain a barometric switch. The switch shall be closed at a pressure differential corresponding to an altitude increase of TOO 2 200 feet with respect to the take-off altitude and shall be open at any altitud
10、e below 700 f 200 feet with respect to the take-off altitude. be limite however, it may be reworked by the contractor and submitted for acceptance as a production equipment, “he apprGed preproduction-sample will b returned to the con- equipment meets all the requirements of this specification and th
11、e contract. Preproduction tests shall include environmental tests in accordance with the procedures of Specification MIL-T-5422 and interference tests in accordance with Specification MIL-z-6181. 4.2.4 sample shall be by the procuring activSty upon satisfactory completion of all tests. approval of t
12、he preproduction sample. ment prior to the approval of the preproduction sample is at the contractors Preproduction Approval - Approval of the preproduction No production equipments shall be delivered prior to the Prefabrication of production equip- 4.2.5 Production Equipents - Equipments supplied u
13、nder the con- tract shall in all respects, including design, construction, workmanship, performance and quality, be equivalent to the approved preproduction sample. Each equipment shall be capable of successfuly passing the same tests as imposed on the preproduction sample. above shall. constitute c
14、ause for rejection and for equipment already accepted by the government it shall be the obligation of the contractor to make necessary corrections as approved by the procuring activity. Ehidence of noncompliance with the 4.3 Production Sample Tests - When requested by the procuring activity, one equ
15、ipment shall be selected from the first 10 production equipents submitted for acceptance and sent at the contractors expense to a designated government laboratory for tests. This equipment shall be selected by the government inspector after the equipment has successfully passed all individual tests.
16、 for this test. The preproduction sample shall not be selected 4.3.1 Scope of Tests - This equipment may be subjected to any and all tests the procuring activity deems necessary to assure that the produc- _- Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IH
17、S-,-,- MIL-R-240LLA 58 m 777770b 0152775 I m_L_( MIL-R-OJA (W) tion equipment is equivalent to the previously approved preproduction sample in design, construction, workmanship, performance and quality, and that it meets all applicable requirements. 4.3.2 Boduction Sample Approval - Approval of the
18、production sample shall be by the procuring activity upon satisfactory completion of all tests. this test shall be corrected by the contractor to the satisfaction of the procuring activity. tests shall be cause for deliveries of equipment under the contract to cease until proper corrective action is
19、 approved and accomplished. tive action shall also be accomplished on equipment previously accepted when requested by the procuring activity. Any design, material or performance defect made evident during Failure of the production sample to pass any of the Correc- 4.3.3 Reconditioning of Production
20、Test Sample - On completion of the production sample test the equipment shall be reworked by the con- tractor by replacing all wear or damaged items. contractor shall resubmit the equipment for acceptance. After reworking, the 4.4 Acceptance Tests - The contractor shall furnish all samples and shall
21、 be responsible for accomplishing the acceptance tests. inspection and testing shall be under the supervision of the government inspector. Contractors not having testing facilities satisfactory to the procuring activity shall engage the service of a commercial testing labor- atory acceptable to the
22、procuring activity. The contractor shall furnish test reports showing quantitateve results for all acceptance tests. Such reports shall be signed by an authorized representative of the contractor or laboratory? as applicable. the course of manufacture shall not be construed as a guarantee of the acc
23、eptance of the finished product. f ollaring: Ail Acceptance or approval of material during Acceptance tests shall consist of the (i) Individual Tests (2) Sampling Tests (3) Reliability Assurance Tests (4) Special Tests Individual Tests - Each equipment submitted for acceptance 4.4.1 shall be subject
24、ed to the individual tests. to detemnine compliance with the requirements of material workmanship, operational adequacy, and reliability. accepted shall have passed the following tests: These tests shall be adequate As a minimum, each equipment (1) Examination of Product (2) Operational Test (3) Man
25、ufacturing Run-In Test Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-11.4.1.2 Ekamination of Product - Each equipment shall be examined carefuily to determine that the material and workmanship requirements have been met. 4.4.1.2 Operational Test -
26、Each equipment shall be operated long enough to permit the equipment temperature to stabilize and to check suf- ficient characteristics and record adequate data to assure satisfactory equipment operation. Manufacturing Run-In Test - Each equipment shall be operated under the conditions specified her
27、ein for a period of 6 hours without fail- ure, of the equipment. made by using such controls and adjustments that are accessible to the operator during the normal use of the equipment. 4.4.1.3 A failure shall be defined as anything which causes malfunctioning Onlythose adjustments will be permitted
28、which can be .Temperatwe Ambient room Hmidity Ambient room Vibration Any selected frequency within the range of 20 to 30 cps (excluding resonant points) an a minimum amplitude of i 3 g s “he equipment shall be vibrated (without vibration isolators) for a period of l minutes prior to the beginning of
29、 the 6-hour period of operation. Where feasible, the equipment shall be operated during this vibration period for the purpose of detecting flaws and imperfect workmanship. tion within the specified limlts of satisfactory performance is not neces- sarily required during the vibration period. The dire
30、ction of vibration shoul be vertical to the normal mounting plane for five minutes and lateral to that plane for five mnutes. Where it is not feasible to vibrate the equipment in two directions the vertical direction shall be used, Dur- ing the G-hour period of operation following the 10-minute vibr
31、ation period, the equipment shall be mechanically cycled periodically through its various phases of operation. the test started overt except that the 10-minute vibration period need not be repeated when it is certain the failure was not a result of the vibration. Should repetitive failures occur) co
32、rrective action shall be taken to elimi- nate this efect from future equipment, failures. periods to conform with standard working hours. Opera- Should a failure occur, it should be repaired and A record shall be kept of all The hall be used to determine the accept-reject criteria for the Reliabilit
33、y Sampling Test Plan. 4.4.3.4 Length of Heat Portion of Cycle - After stabilization at the high temperature limit required by the test level, the equipment shall be operated two hours during each cycle, Jt. 4.4.3.5 Performance Characteristics to be Measured - At the begin- ning of the heating period
34、, with the equlpnent at the low temperature limit, and again near the end of ehe duty cycle, the following characteristics shall be measured: (1) Functional test of all enabling modes (paragraphs 3.4.3.4 (2) Disabling modes (paragraph 3,4.3 5), (3) Functional test of al1 controls (paragraph 3.4.11).
35、 (4) Stability of altitude index settings (paragraphs 3.4.1 (5) Electrical aural. warning signal (paragraph 3.4.3.1). (6) Delayed reliability signal (paragraph 3.4.3.3). (7) Electrical visual warning signal (paragraph 3,4.3.2). and 4.4.3.2). and 3.4.2). It.4,3,6 Failure Criteria - In addition to the
36、 requirements of Speci- fication MiL-R-23094, the following requirements shall be used to determine when a failure has occurred during the test: (1) Whenever performance characteristics fall below the Acceptance Requirement (paragraph 4.4.3.5) at least one failure has occurred. If subsequent analysi
37、s reveals that several parts have deteriorated, each shall be counted a failure, unless one caused the other parts to fail, 4.4.3,7 Preventive Maintenance - During the period of the tests no preventive measures may be performed upon the equipment except that the calibration adjustments specified in
38、the Detail Requirements (paragraph 3 . 4) may be readjusted at 50 hour intervals. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-Quantity of Equipment6
39、 Offered for Acceptann Quantity to be Selected For Life Test First 25 1 Next 175 1 Next 300 1 1 for each additional 500 or fraction thereof 4.50l Test Conditions - The life test shall be conducted under the following simulated service condltions. Temperature Normal room Altitude NOL ground (o - 5000
40、 ft.) Humidity Room ambient DC Voltage 27.0 4 2,o voits AC Voltage ll5 f 5 volts (at lowest applicable frequency) 4.5.2 mittently. permit the equipment temperature ta stabilize. ment shall be turned on and off several times and put through its various phases of operation, Test Periods - The test may
41、be mui con.t;inuously or inter- Periodicaiy, the equip- Any perioa of peratior: shall be of sufficient duration to 4*5*3 Performance Check - At approximately 8-hour intervals during The performance check the test, a limited performance check shall be made. proposed by the contractor shall be subject
42、 to approval by the procuring activity, 4,!j04 .perfsmnce of the equipment, making particular note of any deficiencies or failures. In the event of part failures, the defective part shall be replaced and the operation resumed for the balance of the test period. A record shall be kept of all failures
43、 throughout the test. This record shall indicate the foUowing: Test Data - The contractor shall keep a daily record of the (i) Part type number (2) The circuit reference symbol number (3) The part function (4.) Name of the manufacturer Provided by IHSNot for ResaleNo reproduction or networking permi
44、tted without license from IHS-,-,-R-2401lA (WP) (7) Nature of the failure (6) The nuniber of hours which the part operated prior to failure. 4.5.4.1 Failure Report - In the event of a failure, the government inspector shall be notified immediately. A report shall be submitted to the procuring activi
45、ty upon completion of the test. contractor shall propose suitable and adequate design or materialcorrec- tions for all failures which occurred. such proposals and determine whether they are acceptable. In this report, the The procuring activitywill review 4.5.5 Reconditioning of Life Test Samples -
46、An equipnent which has been subjected to the life test shall be reconditioned as follows: (i) On completion of the life tests, the equipment shall be reworked by the contractor by replacing all “wear“ items. ment between the contractor and the procuring actiety. The “wear“ items shall be determined
47、by agree- (2) After reworking, the contractor shall resubmit the equipment for acceptance. 4.6 Test Procedures - The procedures used for conducting pre- production tests, acceptance tests and life tests shall be prepared by the contractor and submitted to the procuring activity for review and approv
48、al. The right is reserved by the procuring activity or the govern- ment inspector to modify the tests or require any additional tests deemed necessary to determine compliance with the requirements of this specifica- tion or the contract. Specification MIL-IC-18303 shall be used as a guide for prepar
49、ation of test procedures. from previous contracts such procedures may be used when approved by the procuring activity. When test procedures are available 4.7 Presubmission Testing - No item, part or complete equipment shall be submitted by the contractor until it has been prviously tested and inspected by the contractor and found to comply, to the best of his knowledge and belief, with all applicable requirements. 4.8 Reject
