Airworthiness Directive · Amendment 39-13877 · Bombardier Inc. Model (Otter) DHC-3 Airplanes

AD 2004-24-01

Bombardier Inc. Model (Otter) DHC-3 Airplanes

Airplane

Published: November 29, 2004
Effective: December 28, 2004
Maker: Bombardier Inc.
Supersedes: Nothing

Applies to

This AD affects the following airplane models and serial numbers that are certificated in any category: All Bombardier Inc. Model (Otter) DHC-3 airplanes incorporating 524085 BC, Ltd. Supplemental Type Certificate Number ST01243NY or SA01243NY.

The FAA's summary

The FAA adopts a new airworthiness directive (AD) for all Bombardier Inc. Model (Otter) DHC-3 airplanes that have been modified by 524085 BC, Ltd. Supplemental Type Certificate (STC) Number ST01243NY or SA01243NY. This AD requires you to replace the existing Viking Air Ltd. elevator servo tab assembly with a redesigned Viking Air Ltd. elevator servo tab assembly. This AD results from mandatory continuing airworthiness information (MCAI) issued by the airworthiness authority for Canada. There has been one failure of the elevator servo tab assembly. We are issuing this AD to prevent the structural failure of the elevator servo tab. This failure could lead to loss of control of the airplane.

What it requires

What Must I Do To Address This Problem?

To address this problem, you must do the following:

Actions	Compliance	Procedures
(1) Perform the following actions: (i) Remove the existing elevator sevo tab assembly, consisting of the following part numbers (P/N): C3TE13-12, VALTOC1136-2, and NAS40-2A-LT; (ii) Install the redesigned elevator servo tab assembly, P/N V3TE1137-1.	Replace the elevator servo tab assembly within 300 hours time-in-service (TIS) after December 28, 2004 (the effective date of this AD)	Follow Viking Air Ltd. Service Bulletin V3/01, dated March 6, 2002.
(2) Balance the servo tab assembly to achieve a nose heavy static moment within the limits set by Viking Air Ltd. Service Bulletin V3/01, dated March 6, 2002	After installation of the redesigned servo tab assembly, balance prior to further flight	Follow Viking Air Ltd. Service Bulletin V3/01, dated March 6, 2002.
(3) Do not install any of the following part numbers as part of the servo tab assembly: (i) P/N C3TE13-12; (ii) P/N VALTOC1136-2; (iii) P/N NAS40-2A-LT.	The part numbers should not be installed as of December 28, 2004 (the effective date of this AD)	Not applicable.

Official sources

The Federal Register document · document 04-25674, the legal text
FAA Dynamic Regulatory System (DRS) · search 2004-24-01 for its current status and any corrections

Actions

Compliance

Procedures

(1) Perform the following actions: (i) Remove the existing elevator sevo tab assembly, consisting of the following part numbers (P/N): C3TE13-12, VALTOC1136-2, and NAS40-2A-LT; (ii) Install the redesigned elevator servo tab assembly, P/N V3TE1137-1.

Replace the elevator servo tab assembly within 300 hours time-in-service (TIS) after December 28, 2004 (the effective date of this AD)

Follow Viking Air Ltd. Service Bulletin V3/01, dated March 6, 2002.

(2) Balance the servo tab assembly to achieve a nose heavy static moment within the limits set by Viking Air Ltd. Service Bulletin V3/01, dated March 6, 2002

After installation of the redesigned servo tab assembly, balance prior to further flight

Follow Viking Air Ltd. Service Bulletin V3/01, dated March 6, 2002.

(3) Do not install any of the following part numbers as part of the servo tab assembly: (i) P/N C3TE13-12; (ii) P/N VALTOC1136-2; (iii) P/N NAS40-2A-LT.

The part numbers should not be installed as of December 28, 2004 (the effective date of this AD)

Not applicable.