Interpretation ID: 77-4.27

TYPE: INTERPRETATION-NHTSA

DATE: 11/03/77

FROM: AUTHOR UNAVAILABLE; Francis Armstrong; NHTSA

TO: Chief Counsel

TITLE: FMVSS INTERPRETATION

TEXT: One bus manufacturer, Recreational Vehicles, Inc., is currently manufacturing buses from one model vehicle (GMC-RV) that uses a knock-out rear window for the rear emergency exit. The rear window has a ring inserted in the rubber seal that allows the window to fall out or be easily pushed out after the ring is pulled outward (see attached pictures of converted GMC-RV).

Section 5.4, FMVSS No. 217, does not address the performance requirements of this type of window for meeting the performance requirements of a rear emergency exit.

We request an interpretation regarding the applicability of this type of knock-out rear window for meeting the performance requirements of a rear emergency exit.

ATTACH.

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