Airworthiness Directive · Amendment 39-22737 · Time limits/maintenance checks
De Havilland Aircraft of Canada Limited (Type Certificate Previously Held by Bombardier, Inc.) Airplanes
This AD applies to all De Havilland Aircraft of Canada Limited Model DHC-8-401 and -402 airplanes, certificated in any category.
The FAA is adopting a new airworthiness directive (AD) for all De Havilland Aircraft of Canada Limited Model DHC-8-401 and -402 airplanes. This AD was prompted by a determination that new or more restrictive airworthiness limitations are necessary. This AD requires revising the existing maintenance or inspection program, as applicable, to incorporate new or more restrictive airworthiness limitations. The FAA is issuing this AD to address the unsafe condition on these products.
Within 60 days after the effective date of this AD, revise the existing maintenance or inspection program, as applicable, to incorporate the information specified in figure 1 to paragraph (g) of this AD. The initial compliance time for each task in the AMM Task column of figure 1 to paragraph (g) of this AD is at the time specified in the initial compliance time column of figure 1 to paragraph (g) of this AD or within 12 months after the effective date of this AD, whichever occurs later.
| Effectivity | Initial compliance time | Interval limitation | AMM task |
|---|---|---|---|
| All | 10,000 total flight hours (FH) | 10,000 FH | 21-31-00-710-801 |
| All | 20,000 total FH | 20,000 FH | 21-31-00-710-803 |
| All | 20,000 total FH | 20,000 FH | 21-31-00-710-804 |
| All | 35,000 total FH | 35,000 FH | 22-11-00-720-803 |
| All | 30,000 total FH | 30,000 FH | 26-20-00-900-801 |
| All | 30,000 total FH | 30,000 FH | 26-20-00-900-802 |
| All | 30,000 total FH | 30,000 FH | 26-20-00-900-805 |
| All | 30,000 total FH | 30,000 FH | 26-20-00-900-807 |
| All | 30,000 total FH | 30,000 FH | 26-20-00-900-803 |
| All | 30,000 total FH | 30,000 FH | 26-20-00-900-804 |
| All | 20,000 total FH | 20,000 FH | 26-20-00-710-801 |
| All | 20,000 total FH | 20,000 FH | 28-21-00-710-801 |
| All | 10,000 total FH | 10,000 FH | 29-12-00-720-803 |
| All | 4,950 total FH | 4,950 FH | 29-12-00-720-805 |
| All | 4,950 total FH | 4,950 FH | 29-12-00-720-802 |
| All | 4,950 total FH | 4,950 FH | 29-12-00-720-804 |
| All | 30,000 total FH | 30,000 FH | 30-11-00-710-802 |
| All | 5,280 total FH | 5,280 FH | 31-41-00-710-802 |
| All | 1,760 total FH | 1,760 FH | 32-11-00-210-802 |
| All | 30,000 total FH | 30,000 FH | 52-24-00-210-802 |
| All | 4,400 total FH | 4,400 FH | 61-20-00-710-802 |
| All | 150 total FH | 150 FH | 77-31-00-710-803 |
After the existing maintenance or inspection program has been revised as required by paragraph (g) of this AD, no alternative actions (e.g., inspections) or intervals may be used unless the actions or intervals are approved as an alternative method of compliance (AMOC) in accordance with the procedures specified in paragraph (i)(1) of this AD.
