Common use of BOEING PROPRIETARY Clause in Contracts

BOEING PROPRIETARY. Attachment B to Letter Agreement No. 6-1162-SKC-972 GEnx Engines 269 Passenger Interior (9 Abreast Economy Seating) MODEL 787-9 PERFORMANCE GUARANTEES FOR NORTHWEST AIRLINES, INC. SECTION CONTENTS 1 AIRCRAFT MODEL APPLICABILITY 2 FLIGHT PERFORMANCE 3 AIRCRAFT CONFIGURATION 4 GUARANTEE CONDITIONS 5 GUARANTEE COMPLIANCE 6 EXCLUSIVE GUARANTEES

BOEING PROPRIETARY. Attachment B D to Letter Agreement No. 6-1162-SKC-972 GEnx SKC-971 Trent 1000 Engines 269 236 Passenger Interior (9 Abreast Economy Seating) MODEL 787-9 8 PERFORMANCE GUARANTEES FOR NORTHWEST AIRLINES, INC. SECTION CONTENTS 1 AIRCRAFT MODEL APPLICABILITY 2 FLIGHT PERFORMANCE 3 SOUND LEVELS 4 MANUFACTURER’S EMPTY WEIGHT 5 AIRCRAFT CONFIGURATION 4 6 GUARANTEE CONDITIONS 5 7 GUARANTEE COMPLIANCE 6 8 EXCLUSIVE GUARANTEES

BOEING PROPRIETARY. Attachment B C to Letter Agreement No. 6-1162-SKC-972 GEnx SKC-971 Trent 1000 Engines 269 221 Passenger Interior (9 8 Abreast Economy Seating) Page 1 MODEL 787-9 8 PERFORMANCE GUARANTEES FOR NORTHWEST AIRLINES, INC. SECTION CONTENTS 1 AIRCRAFT MODEL APPLICABILITY 2 FLIGHT PERFORMANCE 3 SOUND LEVELS 4 MANUFACTURER’S EMPTY WEIGHT 5 AIRCRAFT CONFIGURATION 4 6 GUARANTEE CONDITIONS 5 7 GUARANTEE COMPLIANCE 6 8 EXCLUSIVE GUARANTEES

BOEING PROPRIETARY. Attachment B to Letter Agreement No. 6-1162-SKC-972 SKC-971 GEnx Engines 269 236 Passenger Interior (9 Abreast Economy Seating) MODEL 787-9 8 PERFORMANCE GUARANTEES FOR NORTHWEST AIRLINES, INC. SECTION CONTENTS 1 AIRCRAFT MODEL APPLICABILITY 2 FLIGHT PERFORMANCE 3 SOUND LEVELS 4 MANUFACTURER’S EMPTY WEIGHT 5 AIRCRAFT CONFIGURATION 4 6 GUARANTEE CONDITIONS 5 7 GUARANTEE COMPLIANCE 6 8 EXCLUSIVE GUARANTEES

BOEING PROPRIETARY. Attachment B A to Letter Agreement No. 6-1162-SKC-972 SKC-971 GEnx Engines 269 221 Passenger Interior (9 8 Abreast Economy Seating) MODEL 787-9 8 PERFORMANCE GUARANTEES FOR NORTHWEST AIRLINES, INC. SECTION CONTENTS 1 AIRCRAFT MODEL APPLICABILITY 2 FLIGHT PERFORMANCE 3 SOUND LEVELS 4 MANUFACTURER’S EMPTY WEIGHT 5 AIRCRAFT CONFIGURATION 4 6 GUARANTEE CONDITIONS 5 7 GUARANTEE COMPLIANCE 6 8 EXCLUSIVE GUARANTEES