The U.S. aircraft register, updated daily
Parts · Electrical power

Bulb

2,652 failure reports named the bulb in the last ten years, 9,900 since 1995, most often on the Boeing 737; the condition most often found was "inoperative". 16 FAA approvals let 5 companies make a replacement bulb, Lewis Engineering CO, Coltec Industries holding the most (7).

Reports by year

017535052570019952000200520102015202020252182026
Reports by year, as a table
reports
1995102
1996351
1997575
1998700
1999420
2000300
200192
2002138
2003250
2004351
2005349
2006504
2007539
2008126
2009105
2010206
2011275
2012423
2013445
2014448
2015549
2016441
2017338
2018220
2019189
2020173
2021271
2022169
2023157
2024209
2025267
2026218

Which system the reports file it under last ten years

Electrical power2,481Cabin, seats and restraints51Landing gear45Heating, ice protection and utility systems30Airframe structure17Instruments and avionics11Engine6Flight controls4Emergency equipment3Fuel system3
Reports by system, as a table
reports
Electrical power2,481
Cabin, seats and restraints51
Landing gear45
Heating, ice protection and utility systems30
Airframe structure17
Instruments and avionics11
Engine6
Flight controls4
Emergency equipment3
Fuel system3

Models most often reporting it last ten years

Boeing 737732Bombardier CL-600 Challenger and CRJ624Embraer EMB-145 ERJ 145231Boeing 757163Airbus A319150Boeing 767136Airbus A320120Dehavilland DHC-8112Boeing 777102Boeing Of Canada/Dehav Div DHC-846Boeing 74744Embraer EMB-135 ERJ 135 and Legacy24
Models most reported, as a table
reports
Boeing 737732
Bombardier CL-600 Challenger and CRJ624
Embraer EMB-145 ERJ 145231
Boeing 757163
Airbus A319150
Boeing 767136
Airbus A320120
Dehavilland DHC-8112
Boeing 777102
Boeing Of Canada/Dehav Div DHC-846
Boeing 74744
Embraer EMB-135 ERJ 135 and Legacy24

How it failed the condition found, last ten years

inoperative1,965burned out376failed78missing37no test27unsecure22burned15dim15not seated12none10
Conditions found, as a table
reports
inoperative1,965
burned out376
failed78
missing37
no test27
unsecure22
burned15
dim15
not seated12
none10

Engines most often reporting it

General Electric CT7-9B 17General Electric CF6-80C2B1F 2Pratt & Whitney PW4056 2Williams International FJ 44 series 2Austro Engine E4P(series 1CFM International CFM56-7B27 1General Electric CF6-80C2B2 1Pratt & Whitney Canada PT6A-67B 1Pratt & Whitney Canada PW150A 1Rolls-Royce RB211-535E4 1

Approved replacement parts 16 parts manufacturer approvals

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

Lewis Engineering CO, Coltec Industries 7Rosemount Aerospace INC 6Lopresti Speed Merchants 1Ledtronics INC 1Kollsman INC 1

For these models most: Airbus A300 (4), Boeing 747 (3), Mcdonnell Douglas DC-9 (2), Mcdonnell Douglas DC-10 (2), Douglas DC-10 (2), Boeing 707 (2), Mcdonnell Douglas Aircraft Co MD-88 (1), Douglas DC-8 (1), Boeing 727 (1), Beechcraft 58 Baron (1).

MakerPartReplacesFitsGrantedStatus
Ledtronics INCBulb BSD-1884-OCWMS 25237-387McDonnell Douglas DC-9-81 (MD-81), DC-9-82 (MD-82),...2003-01-22current
Lopresti Speed MerchantsBulb/Starter Assembly LSM-500-200-100Modification PartRaytheon 58, 58A, 58PA2002-07-28current
Rosemount Aerospace INCBulb Assembly 56B32KGeneral Electric 9377M66P01General Electric CF6-80C2A1, -80C2A2, -80C2A32001-06-12current
Rosemount Aerospace INCBulb, Temperature Electrical Temperature 56B17TMcDonnell Douglas 56B17T, Lewis 56B17TMcDonnell Douglas DC-10-10, DC-10-30, DC-10-402000-01-26current
Rosemount Aerospace INCBulb, Electrical Res Thermometer Free Air -70( C +70( C 54B11SBoeing 54B11S, Lewis 54B11SBoeing 707-300 Series, 720 Series, 727-200 Series2000-01-26current
Rosemount Aerospace INCBulb Assembly 56B32GMcDonnell Douglas 56B32G, Airbus 56B32G,...Airbus A300-B2-1A, -B2-1C, -B2-2032000-01-26current
Rosemount Aerospace INCBulb Assembly 56B3A11McDonnell Douglas 56B3A11, Lewis 56B3A11McDonnell Douglas DC-8-11, -12, -212000-01-26current
Rosemount Aerospace INCBulb, Electrical Res Thermometer Free Air -70( C +70( C 54B11SDMcDonnell Douglas 54B11SD, Lewis 54B11SDMcDonnell Douglas DC-9-11, -12, -132000-01-26current
Lewis Engineering CO, Coltec IndustriesBulb, Free Air Temperature 54B24SdeHavilland 7SC0071Bombardier, Inc. deHavilland DHC-71997-10-23current
Lewis Engineering CO, Coltec IndustriesBulb Assembly 56B17C ENV, 1446465 SHOPAirbus 56B17CAirbus A300, B2-1A, B2-1C1994-03-21current
Lewis Engineering CO, Coltec IndustriesBulb Assembly 56B32G ENV, 1446475 SHOPAirbus 56B32GAirbus A300, B2-1A, B2-1C1994-03-21current
Lewis Engineering CO, Coltec IndustriesBulb Assembly 1104197, 1408004Airbus 1104197Airbus A300, B2-1A, B2-1C1994-03-21current
Lewis Engineering CO, Coltec IndustriesBulb, Assembly 56B32G EnvBoeing 56B32GBoeing 747-100, -200, -3001994-03-08current
Lewis Engineering CO, Coltec IndustriesBulb, Engine Oil Temp 56B17 Env Rev T, 1446348 Shop Rev CBoeing 56B17Boeing 747-100, -2001994-03-08current
Lewis Engineering CO, Coltec IndustriesBulb Assembly 56B32KG.E. 9366M66P01General Electric CF6-80C1993-02-28current
Kollsman INCBulb, Electrical Resistance 68 01000 0303 (10-3348-8-Boeing 707-(all)1974-07-14current

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.