Approved MIL-PRF-23699G Grade STD Approved SAE AS5780D Grade SPC Approved DEF STAN 91-101 Grade OX-27 French: Meet DCSEA 299/A NATO Code: O-156 Joint Service Designation: OX-27 Pratt & Whitney: Approved 521C Type II General Electric: Approved D-50 TF 1 Allison: Approved EMS-53 (Obsolete)

Honeywell: APU series: 131, GTCP 30, 36, 85 (except -99), 331 and 660; RE100, 220; HGT 400, 750 and 1700; TSCP 700. Engine series: TPE 331, TSE 331, ALF 502, LF507, LTS101, LTP101, T53, T5508D, AL5512, CTS800 Engine Alliance: GP7200 Eurojet: EJ200 General Electric: CF34, CF6, CF700, CJ Series, CT7, CT64, Catalyst, H Series Motorlet: M601D, E and Z Pratt & Whitney: JT3, JT4A, JT8D, JT9D, JT12A, PW4000, PW6000, F117-PW-100 Pratt & Whitney AeroPower (formerly Hamilton Sundstrand)APS 500, 100, 2000, 3000 Pratt & Whitney Canada. Engine series: JT15, PT6 Series, ST6, PW100 (except PW150), PW200, PW300, PW500 & PW600 Series. APU series: PW901A/C, PW980 Rolls-Royce: 250 Series, 501, AE2100 & 3007 Series, BR700 Series, RB211-22/524/535, Tay, Gem, Gnome, Spey, Adour, M45H, Viper (Series MK 301, 521, 522, 526, 535, 540, 601, 623 and 632) Safran Helicopter Engines (formerly Turbomeca): Ardiden, Arriel, Arrius, Arrius 1D, AST 600, Astazou XVI, Larzac, Makila, MTR390, RTM322, TM333, 526, 535, 540, 601, 623 and 632. Approved with restrictions*: Artouste, AST 950, Astazou, Turmo, Bastan