61-23-03: Wing Rear Spar
FAA order 61-23-03 is an airworthiness directive in force since December 4, 1961. The FAA's subject line: Wing Rear Spar. System: airframe structure.
What it applies to as the FAA lists it
- Kind of product
- Aircraft
- Makes
- de Havilland Aircraft Co., Ltd., The
- Models
- D.H.114 Heron Series 2A, D.H.114 Heron Series 2DA, D.H.114 Heron Series 2X
Dates and paperwork
- In force since
- December 4, 1961
- Published
- November 2, 1961
- Docket
- Unknown
- Status
- Current
- The FAA's document
- Read the order on the FAA's site
The order itself the regulatory text, as published
Show the full text (1,560 characters)
61-23-03 DE HAVILLAND: Amdt. 358 Part 507 Federal Register November 2, 1961. Applies to All Heron Model 114 Aircraft Without Modification No. 1454.
Compliance required as indicated.
(a) Cases have occurred of cracking of the wing rear false spar web adjacent to the wing-to-fuselage attachment P/N 14W253/4. To preclude failure of the spar, an X-ray or visual inspection for cracks must be conducted in accordance with de Havilland Technical News Sheet CT(114) No. W.10 Issue 2, within the next 250 hours' time in service after the effective date of this directive and at each 600 hours' time in service thereafter. If cracks are found, repair in accordance with de Havilland Drawing RD14W 224, Issue 4, or subsequent, within the time in service given in paragraphs (1), (2), and (3).
(1) Cracks less than 1/2 inch in length must be repaired at the next wing removal and the inspection in (a) must be made every 600 hours' time in service in the interim between the inspection and the wing removal.
(2) Cracks of 1/2 inch to 1 1/2 inches in length must be repaired within 300 hours' time in service after the inspection.
(3) Cracks exceeding 1 1/2 inches in length must be repaired within the next 150 hours' time in service after the inspection.
(b) The special inspection in (a) is no longer required when the repair per Drawing RD 14W 224, Issue 4, or subsequent, has been incorporated.
(de Havilland Technical News Sheet CT(114) No. W.10 Issue 2 dated July 24, 1961, covers this subject.)
This directive effective December 4, 1961.
Source: FAA Dynamic Regulatory System, airworthiness directives. The FAA's document is the authority; the register counts are this site's, from the FAA register of November 6, 2026. Connections as data: /graph/directive/61-23-03.json · aircraft systems.