M-420(W)’s 2550-2579

Number	Class	Built Date	Renumbered	Retired	Notes
2550	MR-20b	1974	to 3550 in 1986-87		wide nose weight and fuel capacity reduced,
2551	MR-20b	1974	to 3551 in 1986-87		wide nose weight and fuel capacity reduced,
2552	MR-20b	1974		in 1984	wide nose weight and fuel capacity reduced,
2553	MR-20b	1974	to 3553 in 1986-87		wide nose weight and fuel capacity reduced,
2554	MR-20b	1974	to 3554 in 1986-87		wide nose weight and fuel capacity reduced,
2555	MR-20b	1974	to 3555 in 1986-87		wide nose weight and fuel capacity reduced,
2556	MR-20b	1974	to 3556 in 1986-87		wide nose weight and fuel capacity reduced,
2557	MR-20b	1974	to 3557 in 1986-87		wide nose weight and fuel capacity reduced,
2558	MR-20b	1974	to 3558 in 1986-87		wide nose weight and fuel capacity reduced,
2559	MR-20b	1974	to 3559 in 1986-87		wide nose weight and fuel capacity reduced,
2560	MR-20c	1976	to 3560 in 1986-87		wide nose weight and fuel capacity reduced,
2561	MR-20c	1976	to 3561 in 1986-87		wide nose weight and fuel capacity reduced,
2562	MR-20c	1976	to 3562 in 1986-87		wide nose weight and fuel capacity reduced,
2563	MR-20c	1976	to 3563 in 1986-87		wide nose weight and fuel capacity reduced,
2564	MR-20c	1976	to 3564 in 1986-87		wide nose weight and fuel capacity reduced,
2565	MR-20c	1976		in 1987	wide nose weight and fuel capacity reduced,
2566	MR-20c	1976	to 3566 in 1986-87		wide nose weight and fuel capacity reduced,
2567	MR-20c	1976	to 3567 in 1986-87		wide nose weight and fuel capacity reduced,
2568	MR-20c	1976	to 3568 in 1986-87		wide nose weight and fuel capacity reduced,
2569	MR-20c	1976	to 3569 in 1986-87		wide nose weight and fuel capacity reduced,
2570	MR-20c	1976	to 3570 in 1986-87		wide nose weight and fuel capacity reduced,
2571	MR-20c	1976	to 3571 in 1986-87		wide nose weight and fuel capacity reduced,
2572	MR-20c	1976	to 3572 in 1986-87		wide nose weight and fuel capacity reduced,
2573	MR-20c	1976	to 3573 in 1986-87		wide nose weight and fuel capacity reduced,
2574	MR-20c	1976	to 3574 in 1986-87		wide nose weight and fuel capacity reduced,
2575	MR-20c	1976	to 3575 in 1986-87		wide nose weight and fuel capacity reduced,
2576	MR-20c	1976	to 3576 in 1986-87		wide nose weight and fuel capacity reduced,
2577	MR-20c	1976	to 3577 in 1986-87		wide nose weight and fuel capacity reduced,
2578	MR-20c	1976	to 3578 in 1986-87		wide nose weight and fuel capacity reduced,
2579		1976	to 3579 in 1986-87		wide nose weight and fuel capacity reduced,