Page 16 - CASL Newsletter Issue 7

AVIATION TALK

行業快語

What did you know about lightning strikes?

飛機雷擊知多少?

b. If they are not aligned or registered in NRC and ADD,
Highest Probability of Lightning Strikes
they will be defined as new lightning damages.
最容易發生雷擊的情況

 Outer extremities, e.g. wing tip, nose, rudder, etc. Maintenance personnel must undergo aircraft inspections
飛機的結構末端，如翼尖、機頭、升降舵和方向舵的 in accordance with lightning strikes work card
末端等 (compulsory checking), which is assessing the lightning
 Climb and descent phases of flight at an altitude of damages. According to the data from maintenance per-
5,000 to 15,000 feet sonnel, structural engineers determine if the damages are
在 5,000 到 15,000 英尺高度爬升和下降的飛行階段 within lightning allowable damage limits through Structur-
al Repair Manual (SRM).
 During spring and summer
春季和夏季
發現雷擊或機組報告飛機受雷擊時，先核查雷擊損傷的

情況、具體位置和數量，並報告 MCC 及技術服務處工程
Frequency of Lightning Strikes
師。工程師透過 NRC 查詢和推遲項目查詢，確認該飛機
飛機受雷擊的機率
同一位置是否有過類似的雷擊損傷。
 In general, large passenger planes get hit by lightning
once every 3,000 flight hours.
大型客機平均每飛 3,000 飛行小時被雷擊一次。 a. 若損傷情況、位置、數量與 NRC 或推遲項目相符合，
則為已報告過的雷擊損傷，無須再做相關檢查，飛機可
以放行。
After Lightning Strikes Treatment
b. 若與 NRC、推遲項目不符合，或 NRC、推遲項目無相
雷擊後處理
關雷擊損傷；判斷為新發現的雷擊損傷.
 Once lightning strikes damages are identified or re-
ported by flight crews, damages’ appearances, loca-
tions and amount should be first assessed and report- 維修人員參照雷擊工卡對飛機進行檢查（必檢），測量
ed to MCC and TSG engineers. Engineers confirm any 雷擊損傷區域，結構工程師根據損傷數據、參考 SRM 手
similar lightning defects at current damaged locations 冊判斷損傷是否在允許範圍內。
through NRC and Acceptable Deferred Defects (ADD).

a. If the damages’ appearances, locations and
amounts are aligned with NRC and ADD, this will be

treated as reported lightning strikes. Hence, this air-

craft is released to service without undergoing rele- References 資料參考 ：
vant checking. http://www.boeing.com/commercial/aeromagazine/articles/2012_q4/4/
http://news.carnoc.com/list/343/343652.html

16 CASL SPIRIT