BPTO 2389 is an advanced gas turbine lubricant that has a viscosity of 3 centistokes @99°C (210°F) manufactured from synthetic basestocks and advanced technology additives. BPTO 2389 is approved against the U.S. Military’s specification MIL-PRF-7808L Grade 3. It was formulated to specifically provide the combined thermal and oxidation stability properties of commercial Type II lubricants with the low temperature fluidity characteristics of a 3-centistoke oil.
In addition, it has gear-carrying ability equal to or better
than other approved MIL-PRF-7808L Grade 3 oils.
BPTO 2389 thus affords the military operator the lower viscosity advantage of MIL-PRF-7808L Grade 3 oils while providing the higher quality advantages of the Type II commercial oils, especially with respect to better thermal and oxidation stability. BPTO 2389 is fully approved against MIL-PRF-7808L Grade 3 and carries QPL reference 1M-1 or 1P-1.
BPTO 2389 commercial application is predominantly for
helicoper turbo shaft engines and for certain accessories operating in extremely low environmental temperatures in conventional jet aircraft equipment.
Note: The original specification MIL-L-7808 and
subsequent modifications of it up to the present MILPRF-
7808L have traditionally governed the characteristics and quality of aircraft turbine lubricants used in U.S. Air Force equipment. At first, this was also true of commercial equipment. In later years, however, new high-performance jet engines created the need for oils with higher viscosity (5cSt) and better thermal and oxidation stability properties than those outlined by the previous modifications of this specification. The oils developed to meet this need (MIL-PRF-23699) have come to be known as Type II lubricants and have been used for many years in U.S. Navy and commercial jet aircraft. BPTO 2389, in addition to its MIL-PRF-7808L Grade 3 approval, is approved for the following engines in military service by the engine manufacturer on a brand
name basis. Oil for accessories are approved by military specification and/or by brand name. The approvals listed below are current as of the time of printing;
however, the respective manufacturer’s manuals and service bulletins or technical orders should be consulted.
Engines
CFM International: BPTO 2389, by meeting MIL-PRF-7808L Grade 3, is approved for use in CFM56-2A, CFM56-3, CFM56-5 engine models.
General Electric Company: BPTO 2389 conforms to General Electric Specification D50TF1, Class A, and is approved for use in CJ610 and CF700 engines (CJ610
and CF700 Maintenance Manuals 79-00). BPTO 2389 is also approved for F404, F110, J79, J85, T58, T64 and TF34-series engines because it meets MIL-PRF-7808L Grade 3 (see applicable military technical orders).
Honeywell/AlliedSignal Aerospace: BPTO 2389 is approved for use in TPE331 and TSE331 engines (AiResearch Service Information Letter P331-20).BPTO 2389 is also approved for use in T53 engines
(Service Bulletin No. 36) and for the ALF 502 (ALF 502 Maintenance Manual Section 72-00-00). MIL-PRF-7808L Grade 3 approval permits use of BPTO 2389 in the T55-series engines (see applicable military Technical
Orders).
Klimov: BPTO 2389 is approved for use in the RD-33 engine (see applicable pages of the maintenance manual).
MTU/Turbomeca/Rolls-Royce: BPTO 2389 is approved as a substitute (with restrictions) for use on the MTR 390. See maintenance manual before using.
Pratt & Whitney: BPTO 2389 is approved for F100, J52, J57, TF30 and TF33-series engines since it meets MIL-PRF-7808L Grade 3 (see applicable military technical orders). It is also approved, with restrictions,
on the F117 and PW2000. See maintenance manual before using.
Pratt & Whitney Canada: BPTO 2389 is approved for use in PT6T-3, -3B and ST6T-75, -76 engines (Service Bulletin No. 5001).
Rolls-Royce Ltd.: BPTO 2389 is approved for use in the following engines:
Gnome H1000 Mk 101, 501, 501*
Gnome H1200 Mk 100, 600*, 2000* series
Gnome H1400 Mk 120, 3000* series
Gnome H1500-1 Mk 120, 3000* series
Gem 42 Mk 100, 200, 1000 series
* Conditional on Mod compliance.
BPTO 2389 is also approved for all Spey (S.B. 5986) and Tay engine models (R-R letter dated 24 May 1990).
Rolls-Royce/Allison Engine Company: BPTO 2389 is approved for use in 250-series engines according to Section 72-00-00 of the respective operations and
maintenance manual for each engine model. It is also approved for the TF41-series engines since BPTO 2389 meets MIL-PRF-7808L Grade 3 (see applicable military technical orders).
Turbomeca: BPTO 2389 is approved (Turbomeca letter to ESAF 10/94) for the following engines:
- Artouste
- Marbore
- Arbizon
- Turmo
- Astazou*
- Aubisque
- Adour
- Bastan
In addition to the above engines, BPTO 2389 is approved as substitute (with restrictions) on the Arriel 1, the Makila, the Arrius 1, and the TM 333. See applicable
maintenance manual before using.
* For the Astazou XVI, 5 cSt oils are to be used under normal operation. BPTO 2389 is approved as a substitute (with restrictions). See maintenance manual before using.
Accessories
Boeing/Douglas (McDonnell Douglas Corp.): DC-8 turbo-compressor (cabin air) requires 3 cSt lubricant and BPTO 2389 is approved (McDonnell Douglas letter dated February 3, 1977).
Godfrey Precision Products: BPTO 2389 is approved for Type 210 Mk.1/GB.80Mk.1 and Type 211 Mk.1/GB.90Mk.1 compressor and gearbox assemblies(Godfrey Precision Products letter of 4 July 1977).
Hamilton Sundstrand: BPTO 2389 is approved for use in all IDG and CSD models (see appropriate pages of the overhaul manual).BPTO 2389 is approved for all military and commercial
APU applications via the MIL-PRF-7808L Grade 3 approval.
Honeywell/AlliedSignal Aerospace: BPTO 2389 is approved for all commercial APUs except the TSCP700 series. (See applicable pages of maintenance manual.) Since BPTO 2389 is approved against MIL-PRF-7808L
Grade 3, it is approved for military APUs requiring that oil (see applicable technical orders).
Microturbo: Use of MIL-PRF-7808L Grade 3 or AIR 3513 oils is recommended for Saphir I thru IV APUs. BPTO 2389 is approved against MIL-PRF-7808L Grade 3 and meets the requirements of Air 3513 and is
therefore cleared for use in SAPHIR APUs (Service Bulletin 49-10-07).
MTU: BPTO 2389 is approved for use on the AST 950 APU. BPTO 2389 is approved as substitute (with restrictions) on the AST 600 APU. See maintenance manual before using.
Pratt & Whitney Canada: BPTO 2389 is approved for the PW901A APU (see appropriate pages of the overhaul manual).
Solar: BPTO 2389 is approved for APU models T-62T-25, -29, -39, -40 via its MIL-PRF-7808L Grade 3 approval. |
FeaturesVapor Phase Deposits: A major advantage of BPTO 2389 is its ability to limit vapor-phase deposits. With some competitive oils, heavy deposits
have formed where the oil mist and vapors come in contact with hot engine surfaces resulting in migrating deposits.
Load Carrying: BPTO 2389 provides load carrying ability, as measured in the Ryder Gear Test well in excess of requirements established by the engine and
equipment manufacturers. Long life of bearings, gears, and other highly loaded lubricated surfaces is thus assured under normal operating conditions.
Cleanliness: Minimum formation of varnish or sludge deposits is one of the characteristic advantages of BPTO 2389. Long periods of severe operation are
possible without the danger of scavenge pump screen plugging or the corrosion that often accompanies excessive deposits.
Bulk Stability (resistance to physical or chemical change resulting from oxidation): The high degree of oxidation resistance of BPTO 2389 permits
long periods of severe operation without significant increase in viscosity or total acidity, the two principal indicators of product oxidation.
Shelf Life: The shelf life of BPTO 2389 can extend beyond ten years when stored in original, unopened quart cans under acceptable conditions, such as away
from extreme heat and moisture. Likewise, drummed product has an expected shelf life of three years minimum. For all package styles, shelf life can be increased
significantly beyond those stated above, depending upon storage conditions. |
