Parts · Cabin, seats and restraints

Ladder

5 failure reports named the ladder in the last ten years, 8 since 1995, most often on the Boeing 747; the condition most often found was "cracked". 12 FAA approvals let 3 companies make a replacement ladder, Lucas Aerospace Cargo System holding the most (9).

Reports by year

Reports by year, as a table

	reports
1995	2
1998	1
2024	3
2025	2

Which system the reports file it under last ten years

Cabin, seats and restraints3Airframe structure2

Reports by system, as a table

	reports
Cabin, seats and restraints	3
Airframe structure	2

Models most often reporting it last ten years

Boeing 7475

Models most reported, as a table

	reports
Boeing 747	5

How it failed the condition found, last ten years

cracked5

Conditions found, as a table

	reports
cracked	5

Approved replacement parts 12 parts manufacturer approvals

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

Lucas Aerospace Cargo System 9Machining Programming Manufacturing INC 2Dassault Falcon Jet CORP 1

For these models most: Boeing 747 (9).

Maker	Part	Replaces	Fits	Granted	Status
Machining Programming Manufacturing INC	Ladder, Access Aft Equipment Bay LD001-2 (Primer)	New Part	Bombardier, Inc. Challenger 300 Models...	2003-12-02	current
Machining Programming Manufacturing INC	Ladder, Access Aft Equipment Bay LD001-1 (Powdercoat)	New Part	Bombardier, Inc. Challenger 300 Models...	2003-12-02	current
Lucas Aerospace Cargo System	Ladder Assembly 452U1076-1	Boeing 452U1076-1	Boeing 747-400F Series	1999-11-09	current
Lucas Aerospace Cargo System	Ladder Assembly 452U1076-5	Boeing 452U1076-5	Boeing 747-400 Series, 747-400F Series	1999-11-09	current
Lucas Aerospace Cargo System	Ladder Assembly 452U1076-4	Boeing 452U1076-4	Boeing 747-400 Series, 747-400F Series	1999-11-09	current
Lucas Aerospace Cargo System	Ladder Assembly 452U1076-8	Boeing 452U1076-8	Boeing 747-400 Series	1999-11-09	current
Lucas Aerospace Cargo System	Ladder Assembly 452U1076-9	Boeing 452U1076-9	Boeing 747-400 Series	1999-11-09	current
Lucas Aerospace Cargo System	Ladder Assembly 452U1076-6	Boeing 452U1076-6	Boeing 747-400 Series, 747-400F Series	1999-11-09	current
Lucas Aerospace Cargo System	Ladder Assembly 452U1076-3	Boeing 452U1076-3	Boeing 747-400F Series	1999-11-09	current
Lucas Aerospace Cargo System	Ladder Assembly 452U1076-2	Boeing 452U1076-2	Boeing 747-400 Series, 747-400F Series	1999-11-09	current
Lucas Aerospace Cargo System	Ladder Assembly 452U1076-7	Boeing 452U1076-7	Boeing 747-400 Series, 747-400F Series	1999-11-09	current
Dassault Falcon Jet CORP	Ladder F50-53162-39, per FJC Dwg....	Modification Part	Avions Marcel... AMD/BA) (AMD/BA Falcon 50.	1986-01-16	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.