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Counter Drum Pointer Altimeter Regulations in JAR-OPS 1 Future of TGL 33 Presented by

Counter Drum Pointer Altimeter Regulations in JAR-OPS 1 Future of TGL 33 Presented by Maria Algar Ruiz (CJAA) Dirk Sajonz (Chairman JAA EQSG). Background. The requirements for counter drum pointer altimeters were introduced in OPS 1.652 via NPA OPS 15 some years ago.

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Counter Drum Pointer Altimeter Regulations in JAR-OPS 1 Future of TGL 33 Presented by

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  1. Counter Drum Pointer Altimeter Regulations in JAR-OPS 1 Future of TGL 33 Presented by Maria Algar Ruiz (CJAA) Dirk Sajonz (Chairman JAA EQSG) 22 November 2006

  2. Background • The requirements for counter drum pointer altimeters were introduced in OPS 1.652 via NPA OPS 15 some years ago. • These requirements are based on the corresponding Standard in ICAO Annex 6, Part I, Chapter 6.9.1. • The Introduction of the CDP ALT Standards are result of the ICAO CFIT program. • The revised JAR-OPS 1.652 (c) and (k)(1) were introduced with Amendment 3 to JAR-OPS 1. • Some States were faced with introduction problems, leading to an OST decision to allow exemptions. • An harmonized exemption policy was agreed by OST by publishing JAA TGL 33 22 November 2006

  3. JAA TGL 33 • TGL 33 allowed States to grant limited exemptions on the CDP ALT rules. • The exemption dates were extended twice. The current policy ends 31 March 2007. • In the TGL, it is indicated that JAA will evaluate to permanently alleviate airplanes without a pressurized cabin and operating below FL 100. • EQSG did not support this idea ever since, as expressed in the Comment Response Document of NPA OPS 15 22 November 2006

  4. Future of the CDP Rule and TGL 33 • Amending the CDP ALT rule implies that JAA needs to have good technical arguments, as the alleviation is a non-compliance with an ICAO Standard. • For the time being, EQSG did not receive any figures justifying such rule amendment. • The OST decision (at OST 06-4) to request EQSG to perform an RIA need to be reconsidered. • EQSG would request the OST to initially agree to amend the rule or not in order to initiate an NPA / RIA process. • If this was agreed, the exemption policy needs to be extended also, leading to a revision of TGL 33. EQSG request OST to reconsider this as well. 22 November 2006

  5. Recent ICAO Developments • The current version of ICAO Annex 6, Part III contains the CDP ALT Standard, similar to this for airplanes. • ICAO agreed to remove this CDP ALT Standard for helicopters. • However, it should be noted that, although helicopters are usually not pressurized, a simple reflection of the revised standards on airplanes is not a proper solution. • EQSG feel that some thorough study is needed here, bearing in mind the results of the ICAO CFIT program. • As far as EQSG is aware of, ICAO does not plan to alleviate non-pressurized airplanes from the CDP ALT Standards. 22 November 2006

  6. Thank you!! If there are no further questions, it is proposed to move to the discussion on the WP on the counter drum pointer requirements in JAR-OPS 1 22 November 2006

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