However, if Hainan Airlines Holding (HNA) is not able to complete the replacement of the wing position light lens before the airplane is dispatched and this would cause a delay, then Boeing suggests the following for this particular case:
a) Apply at least 2 layers of high-speed tape onto the entire cover with 50% overlap.
b) Trim the speed tape as required to obtain a smooth surface.
c) The light must be deactivated by opening the relevant circuit breaker and limited to daylight operation only.
d) Apply MEL 33-11 for daylight operations. The airplane must operate during daylight hours (sunrise to sunset).
e) Inspect the temporary repair prior to each flight to ensure that there is no further damage to the lens/aluminum speed tape and that there is no moisture ingress into the lens.
f) Boeing recommends replacing with a new lens at the earliest opportunity when the part is available or before 5 Flight Cycles. Continued use of the speed tape could allow water ingression and damage to the light assembly.
普通的387和327灯泡的亮度的误差是±25%,这个误差是比较大的,一些生产工艺更好,亮度误差更小的灯泡,后缀会加上AS15,表示在标准电压下工作10小时后,亮度误差不超过15%(the lamps are aged at rated voltages for a minimum of 10 hours and are selected to have a +/- 15% tolerance),这些误差更小的灯泡,可以用来作为仪表指示等关键指示灯。
PC 33-14-00-02第10项和第30项的零件号仅表示哪些灯可以安装在备用灯泡储物箱中,而不表示在飞机照明系统中安装/更换烧坏的灯时主题灯的互换性。P/N:387是工业(ANSI)标准零件号;它相当于MS25237-387和M6363-8-7军用标准零件号。GE387是工业标准灯387,带有通用电气的制造商前缀。反过来,P/N:327是工业(ANSI)标准零件号;它相当于MS25237-327军用标准零件号。