Dornier 328 

Service Bulletin 328 Support Services GmbH 

 Customer Services Global Support Center 

 P. O. Box 1252 Phone +49 (0) 8153 88111-6666 

 D-82231 Wessling Telefax +49 (0) 8153 88111-6565 

 Fed. Rep. of Germany 

Model Dornier 328 Rev. No. No. SB-328-25-491

 

 Rev. Date. Date of Issue Mar 18, 2010 

 

 Page 1 of 6

 

SB

SB-328-25-491 

 Title: Equipment/Furnishings – Installation of an Improved Door 

Locking device. 

1. PLANNING INFORMATION 

Effectivity 

Dornier 328-100. 

EASA Type Certificate Datasheet: TCDS A.096. 

Serial-No’s: All aircraft. 

Reason 

Flight compartment door locking device might get loose and may drop in the area of Flight 

Control Cable below the door. 

Description 

This Service Bulletin describes the installation of the improved safety door locking device. 

Compliance 

Mandatory. 

It is mandatory to replace the safety door locking device to avoid loss of door locking 

function and potentially drop to the area of flight control cable below the door. 

This Service Bulletin must be performed within the next C-check or higher. 

Approval 

The technical content of this Service Bulletin is approved under the authority of DOA ref. 

EASA.21J.033. 

This modification is covered by CN-01027. 

328 Support Services GmbH is TC-Holder of Dornier 328 Jet and Prop and authorized to provide necessary approved data. Any Dornier 328 approved data 

will be established and veryfied by GCT Design Organisation as authorized and responsible Dornier 328 Design Organisation per EASA approval EASA 

21J.033. For details in this matter please contact 328 Support Services GmbH or EASA authority. 

It is the operator‘s responsibility to comply with the relevant aviation regulations of the country in which the aircraft is registered. 
Page 2 of 6 SB-328-25-491

 

Manpower 

Access: 0.30 Mhrs. 

Modification: 0.40 Mhrs. 

Close-up: 0.30 Mhrs. 

Total: 1.00 Mhrs. 

Material 

According to Material Parts List. 

Special Tools 

Not necessary. 

Weight and Balance 

Not affected. 

Electrical Load Data 

Not affected. 

References 

SB-328-25-485 

Other Publications Affected 

AIPC X 

 

. 

Reporting 

Compliance of this Service Bulletin must be reported to 328 Support Services GmbH 

Customer Services Department using the Compliance Report for Configuration Control. 
 

 Dornier 328 

Service Bulletin 328 Support Services GmbH 

 Customer Services Global Support Center 

 P. O. Box 1252 Phone +49 (0) 8153 88111-6666 

 D-82231 Wessling Telefax +49 (0) 8153 88111-6565 

 Fed. Rep. of Germany 

Model Dornier 328 Rev. No. No. SB-328-25-491

 

 Rev. Date. Date of Issue Mar 18, 2010 

 

 Page 3 of 6

 

SB

2. ACCOMPLISHMENT INSTRUCTIONS 

CAUTION: OBEY THE SAFETY PRECAUTIONS AND THE GENERAL 

MAINTENANCE PRACTICES ACCORDING TO THE AMM JIC 

CHAPTER 00. 

A Preparation 

(1) Make the aircraft safe for maintenance according to AMM JIC 00-30-01. 

B Modification 

(1) Remove the lock-door / latch mechanism NR5577 from the flight compartment 

door assy according to AMM JIC 52-51-00. See also Fig. 1. 

(2) Remove the door locking device 001A252A3914012 from the cockpit wall. 

(3) Install the improved door locking device 001A252A3914016 to the cockpit wall. 

(4) Re-install the lock-door / latch mechanism NR55777 to the flight compartment 

door assy according to AMM JIC 52-51-00. 

C Close-up 

(1) Perform a foreign object inspection in modification area. 

(2) Perform cockpit door operational test, that the door can be opened and latched 

in the open position. 

(3) Return aircraft to a flyable status. 
Page 4 of 6 SB-328-25-491

 

3. MATERIAL INFORMATION 

A Material Parts List 

Item No P/N Qty Nomenclature Remarks 

1 001A252A3914016 1 Door locking device New 

 

Table 1 
 

 Dornier 328 

Service Bulletin 328 Support Services GmbH 

 Customer Services Global Support Center 

 P. O. Box 1252 Phone +49 (0) 8153 88111-6666 

 D-82231 Wessling Telefax +49 (0) 8153 88111-6565 

 Fed. Rep. of Germany 

Model Dornier 328 Rev. No. No. SB-328-25-491

 

 Rev. Date. Date of Issue Mar 18, 2010 

 

 Page 5 of 6

 

SB

Fig. 1. Cockpit wall, latch mechanism and door locking device. 

OLD 

NEW
Page 6 of 6 SB-328-25-491

 

Fig. 2. Installation of an improved door locking device. 

 

 (a) (b) 

Fig. 3. Door open (a) Not locked, and (b) Locked. 
 

 Dornier 328/328J 

Compliance Report 328 Support Services GmbH 

 Customer Services Global Support Center 

 P. O. Box 1252 Phone +49 (0) 8153 88111-6666 

 D-82231 Wessling Telefax +49 (0) 8153 88111-6565 

 Fed. Rep. of Germany e-mail gsc.op@328support.de 

CR

Please complete this Compliance Form for each aircraft only when it is applicable, 

and mail or fax to: 

Attention: Dept. P1 

328 Support Services GmbH 

Customer Services 

P.O.B. 1252 

D-82231 Wessling 

Telefax +40 (0) 8153 88111-6565

From Company: 

_____________________________________________________________________________________ 

 

_____________________________________________________________________________________ 

AOT No.: Rev.: Title: 

 

ASB No.: Rev.: Title: 

 

SB No.: Rev.: Title: 

 

EO No.: Rev.: Title: 

 

Aircraft Serial Number: 

 _____________________________________________________________________________ 

Operator: 

 ________________________________________________________________________________________________ 

Total Flight Hours: Total Landings: 

 ________________________ _________________________ 

Date of compliance: 

 _____________________________________________________________________________ 

Comments: 

 _________________________________________________________________________________________ 

____________________________________________________________________________________________________________ 

____________________________________________________________________________________________________________ 

 __________________ _______________________________ 

 Date Authorized signature