| AD Number | 75-16-22 | Status | Active |
| Effective Date | August 08, 1975 | Issue Date | Not specified |
| Docket Number | Unknown | Amendment | 39-2298 |
| Product Type | ["Aircraft"] | Product Subtype | ["Small/Large Airplane"] |
| CFR Part | --- - Part 39 | CFR Section | N/A |
| Citation | This information is not available. | ||
| Manufacturer(s) | de Havilland Aircraft Co., Ltd., The |
| Model(s) | D.H.114 Heron Series 2A D.H.114 Heron Series 2DA D.H.114 Heron Series 2X |
75-16-22 DeHAVILLAND DH-114: Amendment 39-2298. Applies to all DeHavilland Model DH-114 airplanes modified in accordance with Supplemental Type Certificate (STC) SA1685WE.
Compliance required within the next 200 hours' time in service after the effective date of this AD, unless already accomplished within the last 1500 hours' time in service, and thereafter at intervals not to exceed 1500 hours' time in service from the last inspection.
To prevent excessive wear of the counterweight bushings and subsequent ineffectiveness of the counterweight function, accomplish the following:
Inspect and replace, if required, crankshaft counterweight pins and bushings in accordance with Teledyne Continental Overhaul Manual X-30039 or an equivalent procedure approved by the Chief, Engineering and Manufacturing Branch, ASO-210, P.O. Box 20636, Atlanta, Georgia 30320.
This amendment becomes effective August 8, 1975.