Top Mount
No failure report names the top mount. 10 FAA approvals let 5 companies make a replacement top mount, Aeroparts Plus INC. holding the most (4).
Approved replacement parts 10 parts manufacturer approvals
A parts manufacturer approval (PMA) lets a company other than the aircraft's maker make a top mount and sell it as an approved part for the models named. These are the companies holding such approvals for a top mount:
For these models most: Dehavilland DHC-7 (3), Boeing 737 (3), Dehavilland DHC-8 (2), Bombardier DHC-8 Dash 8 and Q400 (1), Beechcraft B300 King Air 350 (1).
| Maker | Part | Replaces | Fits | Granted | Status |
|---|---|---|---|---|---|
| Rockwell Collins INC | Top Mount PCU 700-2327-001 | 700-2327-001 | Boeing 737-900 Series | 2016-06-01 | current |
| Adaptive Aerospace CORP | Top Mount Assy 9SN08120-3 | 9SN08120-3 | Beechcraft Corporation B300, B300C | 2014-01-28 | current |
| Aeroparts Plus INC. | Top Rear Mount Assembly LM-426-SA16 | deHavilland PN LM-426-SA16 | deHavilland of Canada DHC-7 aircraft | 2011-04-06 | current |
| Aeroparts Plus INC. | Top Mount Assembly LM-431-SA24 | deHavilland PN 8SC0217 | deHavilland DHC-8-101 | 2011-04-06 | current |
| Aeroparts Plus INC. | Top Mount Assembly LM-431-SA24 | deHavilland PN 8SC0217 | deHavilland DHC-8-101 | 2010-05-31 | current |
| Aeroparts Plus INC. | Top Rear Mount Assembly LM-426-SA16 | deHavilland PN LM-426-SA16 | deHavilland of Canada DHC-7 aircraft | 2010-05-31 | current |
| Aeroparts Plus INC | Top Mount Assembly LM-431-SA24 | deHavilland PN 8SC0217 | Bombardier, Inc. DHC-8-101 | 2008-04-27 | current |
| Aeroparts Plus INC | Top Rear Mount Assembly LM-426-SA16 | deHavilland PN LM-426-SA16 | Bombardier, Inc. DHC-7 aircraft | 2008-04-27 | current |
| Tecom Industries INC | T-4000 Top Mount Antenna Parts as listed on MDL 820232 | Modification Part | Boeing 737-300, L-1011 | 2002-06-09 | current |
| Tecom Industries INC | T-4000 Top Mount Antenna All parts listed on MDL 820232 | Modification Part | Boeing 737-300 series, L-1011 | 2002-06-09 | 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.