Service Bulletin SB-DHC3-01
DEHAVILLAND DHC-3 · Service Bulletins
Overview
This service bulletin addresses modifications required for the fuel system of DHC-3 Otter aircraft that have undergone specific turbine engine conversions. It outlines the reasons for the modification, compliance requirements, and detailed instructions to correct fuel feed issues.
- Applies to DHC-3 Otter aircraft with specific turbine conversions before October 1, 2002.
- Addresses faulty check valves affecting fuel feed from tanks.
- Modification must be completed within 100 hours of operation or the next inspection.
- Operators must verify fuel feed from aft tanks on every flight until modification.
- The modification involves reverting to the original DeHavilland fuel system.
- New fuel burn limitations must be observed after modification.
- The electric boost pump is required for specific operations.
- Modification is FAA approved and should take no more than eight man-hours.
Document
Source
Originally published by texasturbines.com. Sprinkle hosts a reference copy with an added summary, specifications and searchable full text.
Document details
- Type ·
- Service Bulletins
- Year ·
- 2003
- File size ·
- 18 KB
- Publisher ·
- texasturbines.com
- Language ·
- en
What is the Service Bulletin SB-DHC3-01?
The Service Bulletin SB-DHC3-01 is a service bulletins for the DEHAVILLAND DHC-3, dated 2003.
Where does the Service Bulletin SB-DHC3-01 come from?
This copy of the Service Bulletin SB-DHC3-01 was originally published by texasturbines.com and is hosted on Sprinkle as a free, searchable reference copy.
What year was the Service Bulletin SB-DHC3-01 published?
The Service Bulletin SB-DHC3-01 — the DEHAVILLAND DHC-3 service bulletins on file — is dated 2003.
Most owners only have the POH. Here's the essential set for the DEHAVILLAND DHC-3.
- Pilot's Operating Handbook / AFM
- Checklist
- Maintenance Manual
- Parts Catalog (IPC)
- Systems & Wiring
- Service Bulletins on file
- Type Certificate (TCDS)
More DEHAVILLAND DHC-3manuals & documents
Related documents
- DHC-1 DHC-3 DHC-2DEHAVILLAND DHC-1B-2-S3 · Maintenance Manual
- Service Bulletin TTC-SB-DHC3-03-REV-ADEHAVILLAND DHC-3 · Service Bulletins
- Service Bulletin for Beechcraft 95 Travel AirBeechcraft 95 Travel Air · Service Bulletins
- Flight Manual SupplementDEHAVILLAND DHC-3 · Pilot's Operating Handbook
- SERVICE BULLETIN SB 21-3877Beechcraft G58 Baron · Service Bulletins
In this document
Effectivity
All DHC-3 Otter aircraft modified with Texas Turbine Conversions, Inc. STC SA09866SC or Canadian STC SA02-15, turbine engine conversion prior to October 1, 2002.
Reason
Faulty check valves in the combined center and rear tank fuel lines have not opened under some circumstances during aircraft operation.
Compliance
Modification must be completed within the next 100 hours of operation or the next 100-hour inspection, whichever comes first.
Modification Procedure
Detailed steps to modify the fuel system back to the original DeHavilland configuration.
New Fuel Burn Limitations
Operators must observe new fuel burn limitations incorporated in the latest flight manual supplement.
Approval
The engineering aspects of this change in type design are FAA approved.
Safety notes
- Operators must verify proper fuel feed of the aft tanks on every flight until modification.
- Do not takeoff with less than 134 lbs (20 U.S. gal.) of fuel in all three tanks.
- Burn from the front tank for takeoff and landing.
- After takeoff, burn fuel from the aft tank forward.
- The electric boost pump must be used for takeoff, landing, fuel tank selection, and operations above 10,000 feet.
Full document text
Service Bulletin SB-DHC3-01 Date: April 25, 2003 Effectivity: All DHC-3 Otter aircraft modified with Texas Turbine Conversions, Inc. STC SA09866SC or Canadian STC SA02-15, turbine engine conversion prior to October 1, 2002. Reason: Faulty check valves in the combined center and rear tank fuel lines have not opened under some circumstances during aircraft operation. These check valves have not allowed some operators to feed from tanks necessary for long distance operation. Description: This service bulletin provides the requirements and instructions for the modification of the fuel system to correct the feed problem. Compliance: Within the next 100 hours of operation or next 100-hour inspection, whichever comes first. Modify the fuel system according to the following procedure. Until that time, the operator must verify, on every flight, proper fuel feed of the aft tanks as soon as practical after takeoff. Modify the fuel system back to the original DeHavilland fuel system as per the following procedure: 1. Drain all three tanks. 2. Remove the external plumbing lines from the bottom of the center and aft tanks. 3. Install the original plumbing lines per the DeHavilland Maintenance Manual and Illustrated Parts Catalog. 4. Remove the fuel selector control in the cockpit per the DeHavilland Maintenance Manual and move the rear fuel low level indicator wire (E11A20) from pin 3 of the selector control to pin 4 of the control. 5. Remove the stop screw installed on the control faceplate at the twelve o’clock position. 6. Drill off the engraved control faceplate and rivet the original faceplate back on using the four AN470A3-6 rivets supplied. 7. Re-install the fuel selector control per the DeHavilland Maintenance Manual. 8. Test selector for proper operation and clocking. 9. Fill all three tanks and leak check. 10. Observe new fuel burn limitations (these limitations are being incorporated in the latest flight manual supplement revision, TTC-FMS-1, Rev B) - Do not takeoff with less than 134 lbs (20 U.S. gal.) of fuel in all three tanks. - Burn from the front tank for takeoff and landing. - After takeoff, burn fuel from the aft tank forward. Retain as much as possible in the front for landing. - The electric boost pump must be used for takeoff, landing, fuel tank selection, and operations above 10,000 feet. 11. Run engine on the ground and test fuel feed from all three tanks. Approval: The engineering aspects of this change in type design are FAA approved. Man-hours: The modification should take no more than eight man-hours. Parts and labor costs will be paid by Texas Turbine Conversions, Inc up to those limits. All parts removed must be returned to Texas Turbine Conversions, Inc. Material: Fuel system components for the modification will be supplied by Texas Turbine Conversions, Inc. Tooling: Not applicable. Weight and Balance: No Change.