Spanner Nut
No failure report names the spanner nut. 5 FAA approvals let 1 company make a replacement spanner nut, Optimum Engineering & Manufacturing holding the most (5).
Approved replacement parts 5 parts manufacturer approvals
A parts manufacturer approval (PMA) lets a company other than the aircraft's maker make a spanner nut and sell it as an approved part for the models named. These are the companies holding such approvals for a spanner nut:
| Maker | Part | Replaces | Fits | Granted | Status |
|---|---|---|---|---|---|
| Optimum Engineering & Manufacturing | Spanner Nut Z1-100-034-01 | 1-100-034-01 | Honeywell T5311A, T5311B, T5313B | 2003-01-13 | current |
| Optimum Engineering & Manufacturing | Spanner Nut Z1-030-023-02 | 1-030-023-02 | Honeywell T5311A, T5311B, T5313B | 2003-01-13 | current |
| Optimum Engineering & Manufacturing | Spanner Nut Z1-030-194-02 | 1-030-194-02 | Honeywell T5311A, T5311B, T5313B | 2003-01-13 | current |
| Optimum Engineering & Manufacturing | Spanner Nut Z1-080-084-01 | 1-080-084-01 | Honeywell T5311A, T5311B, T5313B | 2003-01-13 | current |
| Optimum Engineering & Manufacturing | Spanner Nut Z1-140-061-01 | 1-140-061-01 | Honeywell T5311A, T5311B, T5313B | 2002-04-18 | 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.