CTHIn ForceLegislation
AD/DO 328/33 - Cabin Pressure Control System
Dornier 328 Series AeroplanesDornier 328 Series Aeroplanes
Start here
Get a plain-English read of Dornier 328 Series Aeroplanes
Turn the raw legal text into a practical explanation grounded in AD/DO 328/33 - Cabin Pressure Control System.
Dornier 328 Series Aeroplanes
| AD/DO 328/33 | Cabin Pressure Control System | 1/2006 |
|---|
| Applicability: | Model 328-100 aeroplanes. |
|---|---|
| Requirement: | For aeroplanes, serial number (S/N) 3005 to 3086 inclusive, without a placard installed on the Cabin Pressure Control System (CPCS) panel in accordance with the Accomplishment Instructions of Dornier Service Bulletins SB-328-21-225, dated27 June 1997, install a placard in accordance with SB-328-21-225. |
| Note 1: For S/Ns after 3086, SB-328-21-225 was incorporated during production. | |
| Note 2: Fitment of a modified Pressurisation Control Unit (PCU) part number 22260A030201 in accordance with the Accomplishment Instructions ofSB-328-21-261, dated 27 January 1999, is an optional alternate method of compliance for this Directive for aeroplanes S/N 3005 to 3086 inclusive. Additionally, fitment of a modified PCU in accordance with SB-328-21-261 to aeroplanes 3087 to 3098 inclusive, 3100, 3101, 3104, 3106, 3107, 3109, 3110, 3112, 3113, 3115, 3117 and 3119 is optional. | |
| Note 3: Placards installed in accordance with SB-328-21-225 or during production must be removed when the modified PCU is fitted. | |
| Note 4: LBA AD 1997-242/3 refers. | |
| Compliance: | Within 30 days after the effective date of this Directive. |
| This Airworthiness Directive becomes effective on 19 January 2006. | |
| Background: | The German Luftfahrt-Bundesamt(LBA) has advised during flight above FL250, when the pressurisation control is set to the MAN mode, a pressurisation drop of approximately 1 000ft may occur for a short time if the pressurisation control is switched back to manual mode. |
| Initially, earlier issues of the LBA Airworthiness Directive required placarding of the CPCS panel on aeroplanes S/N 3005 to 3086, this is reflected in this Directive. However, in late 1999 the LBA introduced the fitment of a modified PCU(SB-328-21-261), as an optional alternate method of compliance (AMOC) to the placarding of the CPCS panel. The AMOC is equally applicable to aeroplanes S/N 3005 to 3086, which were placarded in accordance with SB-328-21-255, and to later aeroplanes which were placarded during production. Following installation of the modified PCU the placard may be removed from the CPCS panel. This information is reflected in Notes 2 and 3 of this Directive. |
|---|