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MODEL AFFECTED:
SUBJECT:
HELICOPTERS AFFECTED:
COMPLIANCE:
DESCRIPTION:
Bell Helicopter has been made aware of a possible fouling condition that may exist
between the number one jackshaft support and the forward firewall of the intake
cowling. This Technical Bulletin provides an inspection procedure to verify adequate
clearance between the N1 jackshaft support and if a fouling condition exists, the
corrective action to be taken. Applicability of this bulletin to any spare parts shall be
determined prior to its installation on an affected aircraft.
APPROVAL:
The engineering design aspects of this bulletin are FAA/ODA approved.
CONTACT INFO:
For any questions regarding this bulletin, please contact:
Bell Helicopter Product Support Engineering - Medium Helicopters
Tel: 450-437-6201 / 1-800-363-8028 / psemedium@bellhelicopter.textron.com
TECHNICAL BULLETIN
212
NUMBER ONE ENGINE JACKSHAFT SUPPORT
INSPECTION AND MODIFICATION OF.
Model
212
helicopters
through 30999, 31101 through 31311, 32101
through 32142 and 35001 through 35103.
[Model 212 helicopters serial number 31312 and
subsequent, 32143 and subsequent, 35104 and
subsequent will have the intent of this bulletin
accomplished prior to delivery.]
Part 1: Recommended.
Part 2: At customer's option.
TB 212-11-211
Page 1 of 8
ECCN EAR99
212-11-211
21 March 2011
serial
number
30501
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Summary of Contents for BELL HELICOPTER 212
- Page 1 Part 2: At customer’s option. DESCRIPTION: Bell Helicopter has been made aware of a possible fouling condition that may exist between the number one jackshaft support and the forward firewall of the intake cowling. This Technical Bulletin provides an inspection procedure to verify adequate clearance between the N1 jackshaft support and if a fouling condition exists, the corrective action to be taken.
-
Page 2: Warranty
Consumable Material: The following material is required to accomplish this bulletin, but may not require ordering, depending on the operator’s consumable material stock levels. This material may be obtained through your Bell Helicopter Textron Supply Center. Part Number Nomenclature Reference *... - Page 3 -0.4 kg x mm/100 * In lateral calculations, - is left and + is right. ELECTRICAL LOAD DATA: Not affected REFERENCES: BHT-212-IPB Illustrated Parts Breakdown BHT-212-MM Maintenance Manual BHT-MED-SRM-1 Structural Repair Manual BHT-ALL-SRM Structural Repair Manual BHT-ALL-SPM Standard Practices Manual...
- Page 4 Torque the three screws 20-25 in/lbs. 16. Remove the transition duct (2, Figure 4) from the inlet cowling (1) by removing the two screws (3) and washers (4) securing the transition duct to the intake cowling assembly. TB 212-11-211 Page 4 of 8 ECCN EAR99...
- Page 5 21. Reinstall the left hand air inlet cowling (2, Figure 1) and latch in place. 22. Close and latch transmission cowling (1). 23. Make an entry in helicopter historical service records indicating compliance with Part 2 of this Technical Bulletin. Figure 1 TB 212-11-211 Page 5 of 8 ECCN EAR99...
- Page 6 Figure 2 TB 212-11-211 Page 6 of 8 ECCN EAR99...
- Page 7 Figure 3 TB 212-11-211 Page 7 of 8 ECCN EAR99...
- Page 8 Figure 4 TB 212-11-211 Page 8 of 8 ECCN EAR99...