Parts · Airframe structure

Airstair

4 failure reports named the airstair in the last ten years, 44 since 1997, most often on the Bombardier CL-600 Challenger and CRJ; the condition most often found was "binding". 19 FAA approvals let 6 companies make a replacement airstair, Airweld INC holding the most (6). The reports call it "airstair", "aft airstair".

Reports by year

Reports by year, as a table

	reports
1997	3
1999	2
2000	2
2001	1
2002	2
2003	10
2004	5
2006	2
2007	4
2011	1
2012	3
2013	2
2014	3
2016	3
2018	1

Which system the reports file it under last ten years

Airframe structure4

Reports by system, as a table

	reports
Airframe structure	4

Models most often reporting it last ten years

Bombardier CL-600 Challenger and CRJ1Saab-Fairchild 3401

Models most reported, as a table

	reports
Bombardier CL-600 Challenger and CRJ	1
Saab-Fairchild 340	1

How it failed the condition found, last ten years

binding1corroded1cracked1out of adjust1

Conditions found, as a table

	reports
binding	1
corroded	1
cracked	1
out of adjust	1

Engines most often reporting it

General Electric CT7-9B 1

Approved replacement parts 19 parts manufacturer approvals

A parts manufacturer approval (PMA) lets a company other than the aircraft's maker make a airstair and sell it as an approved part for the models named. These are the companies holding such approvals for a airstair:

Airweld INC 6Aerocon Engineering Company 6Weber Aircraft INC 3Monogram Systems 2World Auxiliary Power CO 1Gulfstream Aerospace Corporation 1

For these models most: Boeing 757 (5), Boeing 737 (5), Boeing 767 (2), Boeing 747 (2), Boeing 707 (2), Israel Aircraft Industries GULFSTREAM 100 (1), Israel Aircraft Industries ASTRA SPX (1), Israel Aircraft Industries 1125 (1), Boeing 727 (1).

Maker	Part	Replaces	Fits	Granted	Status
Aerocon Engineering Company	Airstair Assembly AC25-ASA220-2250	Modification Part	Airbus S.A.S. A220-100	2026-06-09	current
Monogram Systems	AIRSTAIR ASSEMBLY-FWD 737 870700-604	10-62236-21	Boeing 737-300 SERIES, 737-400SERIES, 737-500 SERIES	2021-06-22	current
Monogram Systems	AIRSTAIR ASSEMBLY-FWD 737 874000-600	S141A648-2	Boeing 737-8, 737-9, 737-8200	2021-06-22	current
Gulfstream Aerospace Corporation	Airstair Assy. 25W331080-503	25W331080-503	Gulfstream Aerospace LP 1125 Westwind Astra, Astra SPX,...	2008-01-16	current
Aerocon Engineering Company	Airstair Assy. All parts noted on AEC...	Modification Part	Boeing 757-200 Series	2006-08-29	current
Airweld INC	Airstair All Parts Noted on World...	Modification part	Boeing 757-200 Series	2001-08-05	current
Airweld INC	Airstair All Parts Noted on...	Modification part	Boeing 747-200 Series	2001-08-05	current
Airweld INC	Airstair All Parts Noted on World...	Modification part	Boeing 707-300, 707-300B, 707-300C Series	2001-08-05	current
Aerocon Engineering Company	Airstair Assembly 1423-5730-301	Modification Part	Boeing 757-200 Series	2000-02-28	current
Aerocon Engineering Company	Airstair Assembly 1423-9025-301	Modification Part	Boeing 767-200, -300	2000-02-21	current
Aerocon Engineering Company	Airstair Assembly 1423-9025-301	Modification Part	Boeing 767-200 & 300	1998-04-08	current
Aerocon Engineering Company	Airstair Assembly 1423-5730-301	Modification Part	Boeing 757-200 Series	1998-03-22	current
Airweld INC	Airstair All Parts noted on World...	Modification Part	Boeing 707-300, 707-300B, and 707-300C Series	1997-12-17	current
Airweld INC	Airstair All Parts noted on World...	Modification Part	Boeing 747-200 Series	1997-12-17	current
Airweld INC	Airstair All Parts noted on World...	Modification Part	Boeing 757-200 Series	1997-12-17	current
Weber Aircraft INC	Airstair 805000	Boeing 805000	Boeing 737	1994-03-07	current
Weber Aircraft INC	Airstair Kit 808150	Boeing 808150	Boeing 737	1994-03-07	current
Weber Aircraft INC	Airstair 808000	Boeing 808000	Boeing 737	1994-03-07	current
World Auxiliary Power CO	Airstair 1423-2700	Modification Part	Boeing 727-200 Series	1993-06-01	current

Sources: the FAA's service difficulty reports since 1995 (a report is a part that failed and was fixed, as filed by an airline, repair station or owner; the count shows reporting as much as reliability) and the parts manufacturer approvals in the FAA's Dynamic Regulatory System. The part name is the reporters' and the approval holders' own words, reduced to the first plain words so that spellings meet.