CTHIn ForceLegislation
AD/F50/94 - Engine Mount Tubing and End Fittings
Fokker F50 (F27 Mk 50) Series AeroplanesFokker F50 (F27 Mk 50) Series Aeroplanes
Start here
Get a plain-English read of Fokker F50 (F27 Mk 50) Series Aeroplanes
Turn the raw legal text into a practical explanation grounded in AD/F50/94 - Engine Mount Tubing and End Fittings.
Fokker F50 (F27 Mk 50) Series Aeroplanes
| AD/F50/94 | Engine Mount Tubing and End Fittings | 6/2006 |
|---|
| Applicability: | Model F27 Mk 050, Mk 0502, and Mk 0604 aircraft, all serial numbers, unless the engine mount frames have been inspected previously in accordance with the Fokker 50/60 MRB Document, Task Numbers 712000-00-09 and 712000-00-10. |
|---|---|
| Requirement: | 1. Perform an X-ray inspection on the engine mount tubing and end fittings in accordance with Section 3. Accomplishment Instructions of Fokker Service Bulletin SBF50-71-047, dated 15 February 2006, or later EASA approved revision.2. Following accomplishment of the Requirement 1 inspection, report all inspection results to Fokker Services in accordance with the procedure described in SBF50-71-047.3. No spare engine mount may be installed on any aircraft as a replacement part, unless it has been X-ray inspected in accordance with Section 3. Accomplishment Instructions of Fokker Component Service Bulletin F8200-035-71-12, dated 15 February 2006, or later EASA approved revision.Note: CAA-NL AD NL-2006-005 refers. |
| Compliance: | 1. Within 2 years after 8 June 2006.2. Within 7 days of accomplishment of Requirement 1 inspection.3. After 15 June 2006. |
| This Airworthiness Directive becomes effective on 8 June 2006. |
| Background: | During scheduled MRB mid-life X-ray inspections of Fokker 50 engine mount frames, severe internal corrosion of the tubes was discovered. In some locations, the depth of the corrosion spots appeared to be more than 50 percent of material thickness. Premature degradation of the synthetic preservation oil film that protects the interior of the tubes and end fittings of the engine mount frames is considered to be the cause of the corrosion. This condition, if not corrected, could ultimately lead to failure of the engine mounting frame in cases where multiple tubes are severely affected. |
|---|
Image unavailable in extracted text
Richard Castles
Delegate of the Civil Aviation Safety Authority
18 April 2006