Parts · Airframe structure

Drain Line

83 failure reports named the drain line in the last ten years, 230 since 1995, most often on the Boeing 737; the condition most often found was "leaking". 9 FAA approvals let 4 companies make a replacement drain line, Airborne Maintenance & Engineering Services holding the most (5). The reports call it "drain line", "drain line", "p4 drain line".

Reports by year

Reports by year, as a table

	reports
1995	1
1996	7
1997	10
1998	5
1999	2
2000	19
2001	9
2002	10
2003	7
2004	2
2005	2
2006	2
2007	7
2008	8
2009	8
2010	7
2011	9
2012	8
2013	12
2014	7
2015	5
2016	6
2017	1
2018	5
2019	14
2020	7
2021	4
2022	11
2023	6
2024	14
2025	3
2026	12

Which system the reports file it under last ten years

Airframe structure23Engine19Cabin, seats and restraints15Heating, ice protection and utility systems15Instruments and avionics7Electrical power2Fuel system1Other and general1

Reports by system, as a table

	reports
Airframe structure	23
Engine	19
Cabin, seats and restraints	15
Heating, ice protection and utility systems	15
Instruments and avionics	7
Electrical power	2
Fuel system	1
Other and general	1

Models most often reporting it last ten years

Boeing 73729Airbus A3209Boeing 7678Bombardier CL-600 Challenger and CRJ6Airbus A3003Airbus A3193Airbus A3212Airbus A3302Boeing 7772Embraer EMB-145 ERJ 1452Mcdonnell Douglas MD-112Messerschmitt-Bolkow-Blohm BK 1172

Models most reported, as a table

	reports
Boeing 737	29
Airbus A320	9
Boeing 767	8
Bombardier CL-600 Challenger and CRJ	6
Airbus A300	3
Airbus A319	3
Airbus A321	2
Airbus A330	2
Boeing 777	2
Embraer EMB-145 ERJ 145	2
Mcdonnell Douglas MD-11	2
Messerschmitt-Bolkow-Blohm BK 117	2

How it failed the condition found, last ten years

leaking19clogged8corroded7damaged6broken5dented5cracked4chafed3loose3contaminated2

Conditions found, as a table

	reports
leaking	19
clogged	8
corroded	7
damaged	6
broken	5
dented	5
cracked	4
chafed	3
loose	3
contaminated	2

Engines most often reporting it

CFM International CFM56-7B27 1CFM International CFM56-7B27/B3 1CFM International CFM56 series 1CFM International LEAP-1B28 series 1International Aero Engines V2500 series 1International Aero Engines V2524-A5 1Pratt & Whitney PT6A series 1Rolls-Royce BR 700 series 1

Approved replacement parts 9 parts manufacturer approvals

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

Airborne Maintenance & Engineering Services 5Safran Cabin INC. 2Rsg Products INC 1Delta G Design INC 1

For these models most: Boeing 737 (5), Airbus Canada Ltd Ptnrsp BD-500 (2), Bell 412 (1), Beechcraft C90 King Air C90 (1), Beechcraft B90 (1), Beechcraft 65 (1).

Maker	Part	Replaces	Fits	Granted	Status
Safran Cabin INC.	Drain Line Aft Dr Mast 79000-750-003	79000-750-003	Airbus Canada... BD-500-1A10	2025-08-18	current
Safran Cabin INC.	Drain Line Aft Dr Mast 79000-750-012	79000-750-012	Airbus Canada... BD-500-1A10	2025-08-18	current
Airborne Maintenance & Engineering Services	FWD Drain Line Installation 0370-38-0000-79	0370-38-0000-79	Boeing 737-700	2022-05-12	current
Airborne Maintenance & Engineering Services	FWD Drain Line Instl 0340-38-0002-79	0340-38-0002-79	Boeing 737-300/400	2022-05-12	current
Airborne Maintenance & Engineering Services	Aft Drain Line Instl 0340-38-0002-99	0340-38-0002-99	Boeing 737-300/400	2022-05-12	current
Airborne Maintenance & Engineering Services	Aft Drain Line Instl 0340-38-0002-49	0340-38-0002-49	Boeing 737-300/400	2022-05-12	current
Airborne Maintenance & Engineering Services	Aft Drain Line Installation 0370-38-0000-49	0370-38-0000-49	Boeing 737-700	2022-05-12	current
Rsg Products INC	Drain Line 09BL224200005-01	09BL224200005-01	Bell 412EP	2020-10-07	current
Delta G Design INC	Drain Line 8007-PL-005	Modification Part	Beechcraft 65-90, 65-A90, B90	2014-05-01	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.