Warning Bell

8 failure reports named the warning bell in the last ten years, 15 since 1996, most often on the Boeing 737; the condition most often found was "false activation". 1 FAA approvals let 1 company make a replacement warning bell, Honeywell International US LLC holding the most (1).

Reports by year

Reports by year, as a table

	reports
1996	1
2000	1
2009	1
2011	1
2012	1
2013	1
2014	1
2016	1
2017	1
2019	1
2020	1
2022	1
2023	1
2024	1
2025	1

Which system the reports file it under last ten years

Emergency equipment4Instruments and avionics2Landing gear1Heating, ice protection and utility systems1

Reports by system, as a table

	reports
Emergency equipment	4
Instruments and avionics	2
Landing gear	1
Heating, ice protection and utility systems	1

Models most often reporting it last ten years

Boeing 7372Boeing 7572Airbus Helicopters AS350 AStar (Écureuil), now H1251Boeing 7671Embraer EMB-145 ERJ 1451Embraer ERJ 170 E170 and E1751

Models most reported, as a table

	reports
Boeing 737	2
Boeing 757	2
Airbus Helicopters AS350 AStar (Écureuil), now H125	1
Boeing 767	1
Embraer EMB-145 ERJ 145	1
Embraer ERJ 170 E170 and E175	1

How it failed the condition found, last ten years

false activation6activated1no test1

Conditions found, as a table

	reports
false activation	6
activated	1
no test	1

Engines most often reporting it

Turbomeca (Safran) ARRIEL 2B1 1

Approved replacement parts 1 parts manufacturer approvals

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

Honeywell International US LLC 1

For these models most: Boeing 707 (1).

Maker	Part	Replaces	Fits	Granted	Status
Honeywell International US LLC	Warning Bell 965-9002-002	10-3248	Boeing 707, 720	2001-06-24	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.