根据波音工程图纸及最新改版后的AMM/IPC手册，驾驶舱灭火瓶的固定卡箍起朝向应该向左（向外），以避免意外碰撞导致开锁。
图纸要求：
下图为错误安装的示例：
但目前从库房领出的新件卡箍，初始朝向都是向右的（还可以用在其它位置，向右就无需调整），如下所示：
对此，可以自行调整卡箍朝向，卡环中心安装固定点虽然是铆接的，但仍可施加外力使其绕安装点转动，转动180度使其朝向向左即可。
对此调整卡箍朝向的方法，已经过波音厂家认可：
R1. Per Kidde Aerospace drawing 896698 ID:001 note 2, it states: “BAND TO BE ASSEMBLED UNLATCHED. LATCH ORIENTATION OPTIONAL, LATCH MAY BE ORIENTED TO OPPOSITE SIDE BY ROTATING STRAP AROUND RIVET ATTACHMENT”.
R2. Per the drawing mentioned above, the rivet PN is 304424 (0.187 Eyelet or Semi-Tubular Rivet Cres, Passivated)
R3. Boeing confirms that the bracket part number P/N : 896698 is the same irrespective of latch orientation. The latch (one strap or two straps) orientation is optional for the bracket assembly on the 737NG and 737MAX fleet.
R4. Boeing has No Technical Objection to reposition the band within the bracket assembly in order to orient the latch to left direction on all 737NG and 737MAX.
