The change in the MRGB oil is to Castrol Transmax Z Synthetic Automatic Transmission Fluid. There is also an increase in the quantity by changing the level indicator on the sight glass. (10 minute job). Also the oil needs to be flushed with 2 changes of the new oil at ~10 and ~ 50 hours after the change. Note: You can do this mod to MOST MRGB's in service. Always thought Jet II was average as a gearbox oil anyway.
Also included is some reduction in finite lives of some components. These are not drastic changes.
When the 135 emerged it was already a "stretched" version of the 108 and I doubt there is much left in it. They cant make enough of them at the moment so why bother to change the formula? They already outsell the 429 109S and 902 combined!! production is around ~ 60 - 70 per year!
Now a little birdie did tell me that IF they got the US military contract for the 145 there would be some tin in the pot for more development.
Imagine a 145 with 5 blades!! No need it's already flying. With 5 blades you don't need ARIS mounts - No 4P vibes. The addition of the 5th blade is offset by the removal of the ARIS mounts.
http://www.eurocopter.com/publicatio...EN&news_id=390
Main parts of the SB here for those that don't have access and apologies for the long post. Keep in mind that there may be "availability" issues.
SERVICE BULLETIN
EC135
EC135-71-033
PAGE 1 of 25
2006-10-30
REVISION 01, 2007-01-23
Power Plant – Version EC135 T2 and EC135 P2 – Retrofit to Version
EC135 T2+ and EC135 P2+
1. Planning Information
A. Effectivity
(1) Helicopters affected: EC135 T2 and EC135 P2.
(2) Components affected: CAD (Cockpit Advisory Display):
Version 2002 NVG and Non VNG or
Version 2003 NVG and Non VNG
VEMD (Vehicle Engine Management Display):
Version 2002 NVG and Non NVG or
Version 2003 NVG and Non NVG
Rotor hub–shaft, preassy L623M1003 109
Rotor mast hub L623M1003 209
Rotor hub–shaft assy L623M1006 102
Main transmission 4649 010 006 or
4649 010 008
Forked lever, preassembled L671M3012 101
Forked lever L671M3004 205
Hinged support, preassembled L671M7003 103
Hinged support L671M7003 208
Placard 2835 kg L110M1814 205 or
L110M1814 206
Placard VNE L110M1814 207 or
L110M1814 208
(3) Spare parts affected: Not applicable.
B. Concurrent Requirements
After accomplishment of the measures given in this Service Bulletin, the pilots must be informed on its content and their attention must be drawn to the fact that they must comply with flight manual EC135 T2+ or EC135 P2+. The subsequently given components are required for accomplishment of this Service Bulletin. If the components are not already installed, they must be retrofitted with accomplishment of this Service Bulletin:
– Torque strut assy (titanium) with P/N L633M1001 104 or L633M1001 105.
– Rotor hub–shaft (reinforced) L623M1003 109 with Euro 4 or Euro 5 mast moment system.
– Main transmission with S/N 0301 or higher.
– Lubricating oil Transmax Z for the main transmission, see SB EC135-63-011.
– XY–fitting L533M2001103 and L533M2002103, see SB EC135-53-016.
– On helicopters without FCDS and without Air Data Computer the ADC2 must be retrofitted, see SB EC135-34-018.
The following Service Bulletins must be accomplished with accomplishment of this Service Bulletin only when they are effective for the helicopter to be retrofitted and have not already been accomplished:
– On helicopters with Miscellaneous Flight Data Acquisistion Unit MFDAU:
SB EC135-31-026.
– On helicopters with AFCS up to S/N 0217: SB EC135-22-005 for retrofit of the improved Automatic Flight Control System (AFCS).
– On helicopters with FCDS up to S/N 0217: ASB EC135-31A-002 for replacement of the PDF and / or ND.
– On EC135 T2 up to S/N 0285: ASB EC135-77A-002 for replacement of the triple RPM indicator.
– On helicopters up to S/N 0325 with CPDS before version 2003: SB EC135-31-009 for modification of the wiring routed to the CPDS.
– On helicopters EC135 T2: Mandatory–SB 319 73 2090 by Turbomeca ”Electronic Engine Control Unit (EECU) with version 6 software – Incorporation of TU90C”.
C. Reason
With this Service Bulletin, ECD offers the retrofit of EC135 T2 to version EC135 T2+ and of EC135 P2 to EC135 P2+ .
Thus, the maximum permissible gross mass (MTOW) increases from 2835 kg to 2910 kg. The “Hot+High” performance of the helicopter is improved i.a.w. the flight manual. The torque ratings increase as follows:
– AEO TOP from 2 x 75% to 2 x 78%.
– AEO Transient from 2 x 80% to 2 x 82%.
– OEI MCP from 1 x 86% to 1 x 89.5%
D. Description
Replace VEMD (Vehicle and Engine Management Display) and CAD (Caution and Advisory Display). Retrofit CAT A switch to High NR System. Reidentify components. Have new FADEC software installed. Replace placards.
E. Compliance
Compliance with this Service Bulletin is optional.
F. Approval
The information or instructions contained in this document refer to change no. 647 and 664.
The technical content of this document is approved under the authority of DOA No. EASA.21J.034.
Master Servicing Manual (MSM) EC135
Page 628
2006.12.04
05-62-00, 6-3
F. (10) Perform HIGH NR mode check (only valid for engine type T2+):
Rated Value Actual Value n
Stabilized hover flight – perform
HIGH NR switch in instrument panel – press
Increase of NRo – record from VEMD
(SYSTEM STATUS)
103.5 %
$ 0.2 %
HIGH NR switch in instrument panel – ON indicator illuminates
Advisory indication HIGH NR – check (if installed)
Flight condition: Level flight – perform
Airspeed – increase slowly to at least 60 KIAS
At 55 KIAS:
Decrease of NRo – record from VEMD
(SYSTEM STATUS)
100.0 %
$0.2 %
Advisory indication HIGH NR – check off (if installed)
Airspeed – decrease slowly to at least 40 KIAS
At 50KIAS:
Increase of NRo – record from VEMD
(SYSTEM STATUS)
103.5 %
$ 0.2 %
Advisory indication HIGH NR – check (if installed)
Stabilized hover flight – perform
HIGH NR switch in instrument panel – press
HIGH NR switch in instrument panel – ON indicator extinguished
Advisory indication HIGH NR – check off (if installed)
Functional Check Flight EC135 T2 / T2+ (CPDS) – Test Report
Form 603 (12 of 31)
Master Servicing Manual (MSM) EC135
Page 624
2006.12.04
05-62-00, 6-4
F. (9) Perform HIGH NR mode check (only valid for engine type P2+):
Rated Value Actual Value n
Stabilized hover flight – perform
HIGH NR switch in instrument panel – press
Increase of NRo – record from VEMD
(SYSTEM STATUS)
103.15 %
$ 0.35 %
HIGH NR switch in instrument panel – ON indicator illuminates
Advisory indication HIGH NR – check (if installed)
Flight condition: Level flight – perform
Airspeed – increase slowly to at least 60 KIAS
At 55 KIAS:
Decrease of NRo – record from VEMD
(SYSTEM STATUS)
100.2 %
$0.2 %
Advisory indication HIGH NR – check
Airspeed – decrease slowly to at least 40 KIAS
At 50KIAS:
Increase of NRo – record from VEMD
(SYSTEM STATUS)
103.15 %
$ 0.35 %
Advisory indication HIGH NR – check (if installed)
Stabilized hover flight – perform
HIGH NR switch in instrument panel – press
HIGH NR switch in instrument panel – ON indicator extinguished
Advisory indication HIGH NR – check off (if installed)
Functional Check Flight EC135 P2 / P2+ (CPDS) – Test Report
Form 603 (10 of 25)