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Standard

CUSHION TOW HITCHES TEST

1974-05-01
HISTORICAL
AIR1353
The main purpose of this test was to determine the application advantages of cushion tow hitches in comparison to the commonly used rigid tow hitch type fitted on heavy aircraft towing tractors. As diverse opinions emerged about its suitability since the introduction on the market of this new tow hitch type, it was intended to physically measure and evaluate the damping capability of this cushioned tow link when applied in practice.
Standard

SOLID-STATE FREQUENCY CONVERTER 400 HERTZ, 3-PHASE OUTPUT

1989-09-01
HISTORICAL
ARP1940
This specification covers the requirements for solid-state frequency converters with 480 [or 380] V 3-phase, 60 [or 50] Hz input and 115/200 V, 3-phase, 400 Hz output capable of powering aircraft type loads requiring MIL-STD-704D quality power. The frequency converter shall be a self-contained unit suitable for the environment of intended use. Typical applications include dedicated use at passenger loading bridges (mounted under the bridge in telescoping bridge applications or fixed installation at base of stationary type loading bridges) with weatherproof enclosures or hangar/lab use where indoor fixed or portable units can be used.
Standard

Aural Protector, Sound

1999-05-01
HISTORICAL
AS23899
This specification covers the design and performance requirements for one type of sound aural protector.
Standard

Aural Protector, Sound

2012-01-24
CURRENT
AS23899A
This specification covers the design and performance requirements for one type of sound aural protector.
Standard

Method of Testing Pre-Conditioned Air Equipment

2008-04-15
HISTORICAL
ARP5374A
This SAE Aerospace Recommended Practice (ARP) applies to Point-Of-Use, Central and Mobile Pre-Conditioned Air Equipment. It does not apply to aircraft mounted equipment.
Standard

EFFECTS OF NO-BREAK POWER TRANSFER ON 400 HZ AUXILIARY-POWER UNITS AND GROUND-POWER UNITS

1992-02-01
CURRENT
AIR4651
This SAE Aerospace Information Report (AIR) describes the characteristics and effects of using no-break power transfer (NBPT) methods when switching between auxiliary-power unit (APU) and ground-power unit (GPU). The GPU may be: a Point-of-use solid-state frequency converter, engine-generator, or motor-generator b Central system powered by motor-generator or solid-state frequency converter
Standard

400-CYCLE GROUND POWER UNIT PROVISIONS FOR AIRCRAFT ELECTRICAL SYSTEM PROTECTION

2002-12-16
CURRENT
ARP760
This SAE Recommended Practice which defines the terms and tabulates the limits of the characteristics for various protective devices used in conjunction with 400-cycle ground power for civil aircraft is intended to assist the airlines in standardizing on 400-cycle protective systems. The limits found to be acceptable in the civil aircraft industry are presented.
Standard

Nose Gear Towbarless Tow Vehicle Basic Test Requirements

2005-02-10
HISTORICAL
ARP5283
The purpose of this specification is to provide airplane operators and tow vehicle manufacturers with: a General design and operating requirements pertinent to test and evaluation of towbarless tow vehicles. Specific design requirements are provided in ARP4852A and ARP4853A. b Test and evaluation requirements. The results of these test evaluations will determine if the loads induced by the tow vehicle will exceed the design loads of the nose gear, reduce the certified safe life limit of the nose gear, or induce a stability problem during pushback and/or maintenance towing operations. This document specifies general test requirements and a test evaluation procedure for towbarless tow vehicles (TLTV) intended for pushback and maintenance towing only. It is not meant for dispatch (operational) towing (see definitions in Section 3). Dispatch towing imposes greater loads on nose gears and structure due to additional passenger, cargo, and fuel loads.
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