Block Hyd
No failure report names the block hyd. 4 FAA approvals let 1 company make a replacement block hyd, Aerotech Engineering INC holding the most (4).
Approved replacement parts 4 parts manufacturer approvals
A parts manufacturer approval (PMA) lets a company other than the aircraft's maker make a block hyd and sell it as an approved part for the models named. These are the companies holding such approvals for a block hyd:
For these models most: Mcdonnell Douglas DC-9 (4), Douglas DC-9 (3), Mcdonnell Douglas Aircraft Co MD-88 (2).
| Maker | Part | Replaces | Fits | Granted | Status |
|---|---|---|---|---|---|
| Aerotech Engineering INC | Block Assy-Hyd Mech, Wing Flap AE980-3176-501 | 4913176-501 | McDonnell Douglas DC-9-14, DC-9-31, DC-9-32 | 2007-03-14 | current |
| Aerotech Engineering INC | Block Assembly.- Hyd. Mech. Wing Flap AMI4913176-501 | 4913176-501 | McDonnell Douglas MD88, MD90-30, DC-9-14 | 2001-09-23 | current |
| Aerotech Engineering INC | Block Assembly.- Hyd. Mech. Wing Flap AMI4913176-3 | 4913176-3 | McDonnell Douglas DC-9-14, DC-9-31, DC-9-32 | 2001-05-20 | current |
| Aerotech Engineering INC | Block Assembly.- Hyd. Mech. Wing Flap AMI4913176-1 | 4913176-1 | McDonnell Douglas DC-9-14, DC-9-31, DC-9-32 | 2001-05-20 | 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.