Appendix 1
(a) The length of the cabin is 880 inches (FS 970 - FS 90).
(b) The number of exit units in each zone is as follows:
Zone A: 1.25;
Zone B: 2.25 (1.25 + 1.0);
Zone C: 2.25 (1.0 + 1.25);
Zone D: 1.25;
Airplane total: 7.0.
(c) Fuselage length factor = 125.8 inches (880"/7.0).
(d) Nominal exit location:
Exit 1: FS 277.2 (120 + (125.8 x 1.25));
Exit 2: FS 565.2 (277.2 + (125.8 x 2.25));
Exit 3: FS 843.3 (565.2 + (125.8 x 2.25)).
(e) Exit offsets, proposed versus nominal:
Exit 1: Offset = 57.2" (277.2 - 220) ;
Exit 2: Offset = 60.2" (560.2 - 500);
Exit 3: Offset = 6.7 (850 - 843.3).
(f) Percent of e 6.5% (57.2/830 x Exit 1: 6.5% (57.2/880 x 100%);
Exit 2: 6.8% (60.2/880 x 100%);
Exit 3: 0.8% (6.7/880 × 100%);
All exits are offset less than 15 percent from the nominal locations and are acceptable.
By inspection, no two exits are closer together than the fuselage length factor of 121.4 inches.
* U.S.G.P.O.: 1990- 717-000/27178