Senior Editor

Jerry Siebenmark

The&nbsp;FAA&nbsp;and&nbsp;<a href="https://ad.easa.europa.eu/ad/CE-20-10">EASA</a>&nbsp;have issued safety bulletins warning operators of certain Hawker jets that duct and sleeve clamps on the air-cycle machine and water separator can become loose and lead to a potential loss of cabin pressure. This condition potentially affects Textron Aviation Hawker 750, 800, 800 (U-125A), 800XP, 850XP, and 900XP series aircraft.

 


According to an <a href="http://prod.uploads.slack.files.api.cncms.aero/FU613GP98/EASA_SIB_CE-20-10_1+(1).pdf">FAA Special Airworthiness Information Bulletin</a> (SAIB), the regulator has received multiple reports in recent years of sudden disconnections of air-conditioning system ducts and sleeves attached to the air-cycle machine and water separator, which can occur at both ends of the air-cycle machine’s discharge duct and immediately downstream of the water separator. Disconnections are usually accompanied by a popping sound or loud bang followed by a cabin rate of climb more than 2,000 fpm, depending on cabin altitude. FAA noted in the SAIB that in each instance reported to the agency, crews were able to safely land their airplanes.

 


Improper re-torquing of the clamps following parts replacement or other maintenance is believed to be behind the disconnections. Textron Aviation is updating sections of the maintenance manual to bring attention to the correct torque requirements for&nbsp;the clamps. The FAA recommends not to under- or over-tighten the clamps beyond Textron’s specifications.

 


For out-of-phase inspections mentioned in the aircraft flexible maintenance schedule, the FAA recommends that maintainers check for the correct torque loading of the clamps after any disturbance of the air-conditioning ducts or rubber sleeves as close as possible to the lower 50-hour limit.

News and issues about aviation maintenance, repair and overhaul (MRO), covering all segments of the aviation industry; and modifications for aircraft and engines. Subjects include product support of aircraft, engines and avionics, MRO company mergers, acquisitions, announcements and personnel, Airworthiness Directives, Supplemental Type Certificate approvals and other topics.

Regulators Note Loss of Cabin Pressure in Hawker Jets

The cabin pressure SAIB applies to Textron Aviation Hawker 750, 800, 800, 800XP, 850XP, and 900XP series jets, FAA says.

2024 Corporate Aviation Leadership Summit

Matt Thurber

News and issues relating to business, corporate and private aviation, primarily regarding turbine-engine-powered airplanes and helicopters. Subjects include aircraft, engines, maintenance, operations, personnel, acquisitions, accidents, safety, security, and training.

Purchase enables company to offer retail aircraft maintenance services in U.S. Southwest

Pinnacle Aviation Buys Mx Provider Aviation One

Work involved major disassembly of the airframe

ExecuJet MRO Completes 120-month Check on Legacy 500 

Extension goes to six years or 4,000 flight hours, whichever is first

Hartzell Lengthens Warranty on Props for Raisbeck King Airs

Curt Epstein

New developments at FBOs including regulations and noise issues; legal disputes; openings, acquisitions and mergers.

The addition will support Flightstar’s MRO growth

Illinois MRO/FBO Flightstar Expands with New Hangar

Combines component repair and overhaul and parts services companies

Jet Parts, DAS Aviation Merger To Improve Efficiency

Amy Wilder

News and issues relating to the aerospace industry that are related to the science, engineering and business of flight in space involving civil, industrial and military applications, and similar topics related to flight in the atmosphere of the Earth that are not covered more directly by other AINonline subject channels. In other words, both astronautical and aeronautical subjects, except for those aeronautical topics that are specifically covered elsewhere on this website.

Installation supports ISR and law enforcement missions

SEA Adds Mission Console and Sensor Mount for Caravan

Charles Alcock

News and developments about airplanes, helicopters and unmanned air vehicles used in all varieties of operations, including airlines, military, business, commercial, general aviation and private.

News about simulators and training procedures, as well as workforce.

More In Maintenance and Modifications

Pinnacle Aviation Buys Mx Provider Aviation One

Purchase enables company to offer retail aircraft maintenance services in U.S. Southwest

ExecuJet MRO Completes 120-month Check on Legacy 500

Work involved major disassembly of the airframe

Hartzell Lengthens Warranty on Props for Raisbeck King Airs

Extension goes to six years or 4,000 flight hours, whichever is first

Illinois MRO/FBO Flightstar Expands with New Hangar

The addition will support Flightstar’s MRO growth

Jet Parts, DAS Aviation Merger To Improve Efficiency

Combines component repair and overhaul and parts services companies

SEA Adds Mission Console and Sensor Mount for Caravan

Installation supports ISR and law enforcement missions

Gulfstream Steps Up Investment in Customer Support

New customer support leader Lor Izzard is building on earlier improvements

Back on the Plate, Pre-buys Still Face Post-covid Challenges

Industry experts caution on the need for a full pre-buy and one that is carefully laid out

AIN Products

SUBSCRIPTIONS

RESOURCES

ABOUT AIN