Heat Sink
No failure report names the heat sink. 8 FAA approvals let 5 companies make a replacement heat sink, Gulfstream Aerospace LP holding the most (4).
Approved replacement parts 8 parts manufacturer approvals
A parts manufacturer approval (PMA) lets a company other than the aircraft's maker make a heat sink and sell it as an approved part for the models named. These are the companies holding such approvals for a heat sink:
For these models most: Israel Aircraft Industries ASTRA SPX (4), Israel Aircraft Industries 1125 (4), Embraer EMB-145 ERJ 145 (1), Bombardier DHC-8 Dash 8 and Q400 (1), Bell 407 (1), Airbus Helicopters AS350 AStar (Écureuil), now H125 (1).
| Maker | Part | Replaces | Fits | Granted | Status |
|---|---|---|---|---|---|
| Dac Engineered Products, LLC | Heat Sink Assembly 537-125-1OPT1-DAC | 537-125, 537-125-1 | Embraer S.A. EMB-145, EMB-145ER, EMB-145MR | 2025-12-29 | current |
| Nextant Aerospace LLC | Heat Sink Assembly 537-41-NT | Goodrich 537-41 | Bombardier Inc. DHC-8-400 Series | 2019-07-26 | current |
| Heritage Aviation LTD | Heat Sink Assy 064-23000-01 | Modification Parts | Bell 407, Serial Numbers 53019 and 53358 only. | 2005-05-05 | current |
| Gulfstream Aerospace LP | Heat Sink 25W813037-005 | IAI 25W813037-005 | Israel 1125 Westwind Astra, Astra SPX | 2001-07-30 | current |
| Gulfstream Aerospace LP | Heat Sink 25W813037-009 | IAI 25W813037-009 | Israel 1125 Westwind Astra, Astra SPX | 2001-07-30 | current |
| Gulfstream Aerospace LP | Heat Sink 25W813037-001 | IAI 25W813037-001 | Israel 1125 Westwind Astra, Astra SPX | 2001-07-30 | current |
| Gulfstream Aerospace LP | Heat Sink 25W813037-007 | IAI 25W813037-007 | Israel 1125 Westwind Astra, Astra SPX | 2001-07-30 | current |
| Geneva Aviation | Heat Sink Bracket G10059 | Modification Part | Eurocopter France AS350B, AS350BA, AS350B1 | 2000-01-04 | 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.