1、M I L-R- 8 1729A( AS) 1 August 1974 SUPERSEDING MIL-R-81729 (AS) 8 July 1969 MILITARY SPECIFICATION RESTRAINT SYSTEMS, AIRCREWMANS This specification has been approved by the Naval Air Systems Command, Department of the Navy. 1. SCOPE 1.1 Scope - This specification covers the general requirements fo
2、r lap and shoulder type restraint systems. -2- 1.2 / Classification - The restraint system assemblies shall be of the following types and classes: Class 1 Class 2 Class 3 Class 4 Class 1 Class 2 Class 1 Class 2 Belt, Gunners, Safety Belt, Troop and Turret Gunners Belt, Passenger Belt, Aircrewmans Be
3、lt, Pilots, Lap and Shoulder Belt, Pilots Auto Release Cart-Operated Harness, Pilots Shoulder, Standard “V“ Harness, Pilots Shoulder, Standard Yr Type Type 2. APPLICABLE DOCUMENTS 2.1 The following documents, of the issue in effect on date of invitation for bids or requests for proposal, form a part
4、 of this specification to the extent speci- fied herein. SPECIFICATIONS Feder al NN-P-530 Plywood, Flat Panel Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-R-81729A (AS) SPECIFICATIONS Federal (Continued) QQ-C-502 PPP-13-566 PPP-3-576 PBP -I3 -
5、5 9 1 PPP-B-601 PPP-B-636 PPP-B-676 Military MIL-P-116 MIL-T-78 1 STANDARDS Copper Rods and Shapes, and Flat Products with Finished Edges (Flat Wire, Strips and Bars) Box, Folding, Paperboard Box, Wood, Cleated, Veneer, (Paper Overlaid) Box, Fiberboard, Wood Cleated Box, Wood, Cleated-Plywood Box, F
6、iberboard Box, Setup Preservation, Methods of Terminal, Wire Rope, Swaging Military MIL-STD-105 MIL-STB- 129 MIL-STD-130 M516036 MS16068 Mi316069 M522033 Sampling Procedures and Tables for Inspection by Attributes Marking for Shipment and Storage Identification Marking of U. S. Military Property Bel
7、t, Aircraft Safety, Pilots, Automatic Release Cartridge Operated Harness, Aircraft Safety, Pilots Shoulder V Type Harness, Aircraft Safety, Pilots Shoulder Y Type Belt, Aircraft Safety, Lap 2 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-Provided b
8、y IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-3.2.1 Protective treatment - When materials are used in the construc- tioii of the restraint systems that are subject to deterioration when exposed to en- vironmental conditions likely to occur during service usa
9、ge, they shall be treated against such deterioration in such a manner that will in no way prevent compliance with the performance requirements of this specification. Protective coatings which might crack, chip, or scale during normal service life or under extremes of en- vironmental eotrditions shal
10、l not be used, 3.3 Design and construction - Each restraint system shall be designed anci cons trusted in accordance with the applicable drawings. The applicable drawing or each ayiiltem is as follows: 3.4 3.4.3 ASSEMBLY APPLICABLE DWG. Class 1 Class 2 Class 3 Class 4 Class 1 Class 2 Class 1 Class 2
11、 62A129E1 AN7508 AN6506 613AS100 60A135E1 62A125D1 MS22033 62A92H1 MS16036 62A 1260 1 MS160 6 8 62A127D1 MS 160 6 9 I Performance - Workinn load - Each assembled restraint system shall be capable _- of withstanding the working loads specified in Table I, appliedfor a period of 39 sec- onds, when tes
12、ted as specified in Section 4. There shall be no evidence of failure, slippage, or damage to the webbing, stitching or metal and the release mechanism of the buckle and latch shall operate without difficulty. 3.4.2 Proof load - Each assembled restraint system shall be capable of withstanding the pro
13、of loads specified in Table I, applied for a period of 30 seconds, when tested as Specified in Section 4. There shall be no evidence of failure, slippage, 4 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-5 Provided by IHSNot for ResaleNo reproductio
14、n or networking permitted without license from IHS-,-,-MIL-R-81729A (AS) or damage to the webbing, stitching or metal parts and the release mechanism of the buckle and latch shall operate without difficulty. 3.4.3 Quick release - The buckles and latch loops shall be an automatic locking type with on
15、e hand disconnect. The force required, when tested as specified in Section 4, shall be as indicated in Table I. 3.4.4 Gun barrel hydrostatic pressure (Typ e II, Class 2) - When tested 8s ispecified in Section 4 the barrel shall show no evidence of deformation. 3.5 Workmanship - The restraint systems
16、 shall be constructed and assembled to produce an item free from all defects which would affect proper func- tioning in service. Particular attention shall be given to neatness, finish, and freedom of parts from all burrs and sharp edges. The restraint systems shall conforin to the quality and grade
17、 of product established by this specification. The occurrence of defects shall not exceed the acceptance criteria established herein. 8.6 Identification - Identification marking shall be in accordance with MIL-STD-130. 4, QUALITY ASSURANCE PROVISIONS 4.1 Responsibility for inspection - Unless otherw
18、ise specified in the contract or purchase order, the supplier is responsible for the performance of all inspection requirements as specified herein. Except as otherwise specified in the contract or order, the supplier may use his own or any other facilities suitable for the performance of the inspec
19、tion requirements specified herein, unless disapproved by the Government. The Government reserves the right to perform any of the in- spections set forth in the specification where such inspections are deemed necessary to assure that supplies and services conform to prescribed requirements. 4.2 Clas
20、sification of inspection - The examination and testing of the restraint system assemblies shall be classified as follows: a. First article inspection - First article inspection consists of examination and tests performed on restraint system assemblies which are representative of the production item
21、after award of a contract to determine that the production item conforms to the requirements of this specification (see 4.3). b Quality conformance inspection - Quality conformance inspec- tion consists of examinations and tests performed on individual products or lots to determine Conformance of th
22、e products or lots with requirements set forth in this specification (see 4.4). 6 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-R-8172 9A (AS) 4.3 First article inspection - First article inspection shall consist of all tests and examinations l
23、isted in this specification. 4.3.1 First article inspection samples - Unless otherwise specified, as soon as practicable after award of the contract or order, the manufacturer shall submit three first article samples together with 10 yards of webbing, 1/4 pound of thread on spool, and two each of al
24、l hardware used in the restraint systems. The samples shall be representative of the construction, workmanship, components and materials to be used during production. When a manufacturer is in continuous pro- duction of these assemblies from contract to contract, submission of further first article
25、inspection samples on the new contract may be waived at the discretion of the procuring activity (see 6.2). Approval of the first article inspection sample or the waiving of the first article inspection does not preclude the requirements for perform- ing the quality conformance inspection. The first
26、 article inspection samples shall be furnished to the Government as directed by the contracting officer (see 6.2). The samples shall be plainly marked with the following information: Samples submitted by (name) (date) for first article inspection in accordance with the requirements of MIL-R-81729(AS
27、) under Contract No. 4.3.1.1 Upon the completion of the first article inspection, all the appli- cable inspection reports, and when applicable, recommendations and comments pertinent for use in monitoring production shall be forwarded to the cognizant Govern- ment Activity. One assembly shall be ret
28、urned to the manufacturer for use in moni- toring production. The remaining samples shall be consumed or destroyed in the first article inspection and shall not be considered as a part of the quantity to be delivered under contract. 4.4 Quality conformance inspection - The quality conformance inspec
29、- tion shall consist of the following: Visual examination Dimensional examination Working load Quick release Hydrostatic pressure Proof load of Cable Assembly Firing pin sear release force Firing pin energy Actuator release force (safety wired) Actuator release force (without safety wire) Tests and
30、examinations at a laboratory Preparation for delivery 7 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-4.4.1 Sampling - 4.4.1.1 Inspection lot - 4.4.1.1.1 Restraint system - An inspection lot size shall be expressed in one Type and Class of restrain
31、t system complete with all components. An inspection Ist dial1 consist of an assembly of one Type and Class, complete with all components made under essentially the same conditions and from the same materials and compo- nents. The sample unit shall be one assembly. 4.4.1.1.2 Preparation for delivery
32、 - An inspection lot shall be expressed in units of one fully prepared shipping container, containing restraint system assemblies fully prepared for delivery, made from essentially the same materials and compo - nonts, The sample unit shall be one shipping container, containing restraint system asse
33、mblies fully prepared for delivery with the exception it need not be sealed, 4.4.1.2 Sampling for tests and examinations of the restraint system assem- - blies - The sample size, acceptance criteria, tests and examinations required for the restraint system assemblies shall be as specified in Table I
34、I and 4.4.1.3. 4.4.1.3 Sampling for tests and examinations of the restraint system at a laboratoq - Upon the completion of the tests and examinations specified in Table II, n random sample shall be selected from each lot in accordatice with MIL-STD-105, Inspection Level 5-3. The sample size (quantit
35、y of restraint system assemblies selected) shall be governed by the acceptable quality level of 1.5 defects per 100 units. Each rrriisembly selected as a sample unit shall be forwarded to the Government lab- oratory selected by the cognizant Government Activity (see 6.3) for the following tests and
36、examinations: TABLE II SAMPLE SIZE, ACCEPTANCE CRITERIA, EXAMINATIONS AND TESTS OF THE RESTRAINT SYSTEM ASSEMBLY INSPECTION METHOD I I SAMPLING Visual 4.3.1 Every unit for critical examinat ion defects. Inspection Level II for minor defects Dimensional 4.5.1 Inspection Level S-2 examination i t 8 AC
37、CEPTABLE QUALITY LEVEL L/ Reject all units with any critical defect. An acceptable quality level of 1.5 defects per 100 units for minor defect Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-R-81729A (AS) TABLE II (Continued) ACCEPTABLE QUALITY L
38、EVEL 1/ INSPECTION METHOD SAMPLING Preparation 4.5.2 Inspection Level S-2 An acceptable quality level of for Delivery Working load 4.5 3 Inspection Level S-2 An acceptable quality level of 4. O defects per i00 units 1.5 defects per 100 units Proof load 21 4.5.4 Inspection Level S-2 An acceptable qua
39、lity level of 1.5 defects per 100 units Quick 4.5.5 Inspection Level S-2 An acceptable quality level of release Hydrostatic 4.5.6 Inspection Level S-2 An acceptable quality level of pressure Working load 4.5.7 Inspection Level S-2 An acceptable quality level of of Cable Assembly Firing pin 4.5.8 Ins
40、pection Level S-2 An acceptable quality level of sear release force Firing pin 4.5.9 Inspection Level S-2 An acceptable quality level of energy Actuator 4.5.10 Inspection Level S-2 An acceptable quality level of release (wired) Ac tua tor 4.5.11 Inspection Level S-2 An acceptable quality level of re
41、lease (unwired) i. 5 defects per 100 units i. 5 defects per 100 units 1.5 defects per 100 units 1.5 defects per 100 units 1.5 defects per 100 units 1.5 defects per 100 units 1.5 defects per 100 units - i/ The sampling plan acceptance number shall apply collectively to all the charac- teristics withi
42、n a stated acceptable quality level. - 2/ Units submitted to this test shall not be shipped as part of the contract or order. 4.5 Inspection methods - 4.5.1 Visual examination - Each of the assemblies selected in accord- ance with Table II and 4.4.1.3 shall be examined visually to determine conforma
43、nce 9 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-R-B1729A Lb W 9999706 0205004 8 W MIL-It-8172 9A (AS) to this specification. The classification of defects, Table III, shall be used to classiQ the defects found, For dimensional defects, each
44、 assembly selected as a sample unit from the lot shall be thoroughly checked dimensionally to determine conformance to this specification. The classification of defects for finished dimen- sions, Table IV, shall be used to classi marking not the same on interior and exterior containers. Any nonconfo
45、rming component, any component missing, damaged or otherwise defective. Inadequate application of components such as incomplete closure of the unit package, inter- mediate package, container flaps, or loose strappings, etc. , bulging or distortion of the container. Number per container is more or le
46、ss than required; gross or net weight exceeds the requirement. 4.5.3 Working load - 4.5.3.1 Type I, Class 1 assembly - The assembly, as shown in Figure 1, shall be passed around two pins which are approximately 2 inches in diameter and which shall be attached to the moving and stationary heads of a
47、tensile testing machine. With the belt buckle locked in place, the heads shall be separated at a rate of 1/2 inch per minute (under no load) until a tensile load of 4000 pounds has been attained and maintained for a period of 30 seconds. There shall be no failure nor evidence of weakening caused by
48、stretching of the stitching between the 1-3/4 inch webbing and the 3 inch webbing. rn addition there shall be no evidence of deformation of the metal parts . 4.5.3.2 Type I, Class 2 assembly - The assembly with the buckle locked shall be passed over a belt support block conforming to Figure 2 and as
49、sembled in the testing machine as shown in Figure 3. The unit shall be capable of withstanding the loads specified in Table I for a period of 30 seconds without failure of any portion of the assembly, and after the release of such load, the release buckle shall work freely. The heads of the testing machine shall be separated at a rate of 1/2 inch per minute (under no load). 4.5.3.3 Type I, Cla
