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 Federal Register Information
 Header Information
DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 39
Amendment 39-837; AD 69-19-03
DOWTY ROTOL Models (c) R.130/4-20-4/12E and (c) R.148/4-20-4/21E Propellers
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Preamble Information
AGENCY: Federal Aviation Administration, DOT
DATES: Effective October 6, 1969.
Regulatory Information
69-19-03 DOWTY ROTOL: Amdt. 39-837. Applies to Dowty Rotol Propellers Type Nos. (c) R.130/4-20-4/12E and (c) R.148/4-20-4/21E installed on British Aircraft Corporation (Vickers) Viscount 744 and 745D airplanes.
Compliance required as indicated, unless already accomplished.
(a) For Type No. (c) R.130/4-20-4/12E propellers installed on Model 745D, Viscount airplanes and for Type No. (c) R.148/4-20-4/21E propellers installed on Model 744 Viscount airplanes, accomplish the following:
(1) For propellers having hubs with 15,000 or more hours' time in service on the effective date of this AD, accomplish the inspection required by paragraph (3) of this section within the next 400 hours' time in service after the effective date of this AD, or before 3,000 hours' time in service since the last inspection, whichever occurs later. Thereafter, repeat this inspection at intervals not to exceed 3,000 hours' time in service from the last inspection.
(2) For propellers having hubs with less than 15,000 hours' time in service on the effective date of this AD, accomplish the inspection required by paragraph (3) of this section before 3,000 hours' time in service has accumulated since the last inspection, or before the accumulation of a total of 15,400 hours' time in service, whichever occurs later. Thereafter, repeat this inspection at intervals not to exceed 3,000 hours' time in service from the last inspection.
(3) Inspect the hub arm threads including binocular inspection and crack testing in accordance with Dowty Rotol Limited Service Bulletin No. 61-608, Revision 1, dated June 1968, or later ARB-approved issue, or an FAA-approved equivalent method. If cracked threads are detected during any inspection, before further flight, replace the propeller hub with a serviceable part of the same part number.
(b) For Hub and Driving Center Assembly P/Nos. RA.48546, RA.59601, and RA.59602 installed on propellers having serial numbers listed in paragraph (c) accomplish the following:
(1) Remove from service all hub and driving center assemblies having 20,000 or more hours' time in service on the effective date of this AD within the next 400 hours' time in service after the effective date of this AD.
(2) Remove from service all hub and driving center assemblies having less than 20,000 hours' time in service on the effective date of this AD, within the next 400 hours' time in service after the effective date of this AD, or upon the accumulation of a total of 20,000 hours time in service, whichever occurs later.
(c) Propeller Serial Numbers
| DRG.12/61 | 99241 | 99381 | 99568 | 99749 | 102071 |
| DRG.13/61 | 99244 | 99386 | 99573 | 99752 | 102073 |
| DRG.15/61 | 99266 | 99388 | 99575 | 99754 | 102148 |
| 574 | 99267 | 99395 | 99577 | 99759 | 102149 |
| 5733 | 99268 | 99396 | 99578 | 99766 | 102152 |
| 57265 | 99269 | 99397 | 99579 | 99771 | 102166 |
| 57268 | 99270 | 99399 | 99580 | 99772 | 102167 |
| 98338 | 99272 | 99403 | 99587 | 99784 | 102168 |
| 99180 | 99275 | 99405 | 99594 | 99791 | 102170 |
| 99186 | 99276 | 99407 | 99596 | 99800 | 102184 |
| 99187 | 99278 | 99409 | 99597 | 99804 | 102257 |
| 99190 | 99281 | 99410 | 99600 | 100024 | 102259 |
| 99191 | 99283 | 99411 | 99603 | 100025 | 102349 |
| 99198 | 99284 | 99413 | 99606 | 100040 | 102489 |
| 99207 | 99323 | 99417 | 99609 | 101579 |  |
| 99211 | 99330 | 99427 | 99613 | 101584 | |
| 99217 | 99337 | 99429 | 99614 | 101586 | |
| 99218 | 99339 | 99434 | 99615 | 101804 | |
| 99220 | 99341 | 99437 | 99617 | 101929 | |
| 99221 | 99352 | 99440 | 99620 | 101985 | |
| 99222 | 99353 | 99443 | 99621 | 101986 | |
| 99224 | 99368 | 99468 | 99741 | 101987 | |
| 99231 | 99369 | 99472 | 99742 | 102041 | |
| 99235 | 99375 | 99546 | 99743 | 102046 | |
| 99239 | 99377 | 99557 | 99745 | 102052 | |
(d) For hub and driving center assembly having P/Nos. listed in paragraph (e), accomplish the following:
(1) Remove from service all hub and driving center assemblies having 30,000 or more hours' time in service on the effective date of this AD, within the next 400 hours' time in service after the effective date of this AD.
(2) Remove from service all hub and driving assemblies having less than 30,000 hours' time in service on the effective date of this AD within the next 400 hours' time in service after the effective date of this AD, or upon the accumulation of a total of 30,000 hours' time in service, whichever occurs later.
(e) Hub and Driving Center Assembly Part Numbers
| RA41744 | RA47436 |
| RA44761 | RA47436/2 |
| RA44761/1 | RA47436/4 |
| RA44761/2 | RA47592 |
| RA44761/3 | RA48546 |
| RA44761/4 | RA49557 |
| RA44761/5 | RA56345 |
| RA45155 | RA58184 |
| RA45155/1 | RA59601 |
| RA45155/2 | RA59602 |
This amendment becomes effective October 6, 1969.
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