Correction there were one or more attempts to bomb Petrograd right after the February/march 1917 revolution the German army airship LZ120 was ordered to bomb Petrograd, couldn't because of the incredibly bad weather. One should point out that weather forcasting was still fairly new back then and the Germans airships were big, and had a top speed of 65 mph. Getting into a winter storm in one was no fun at all for the crew.
After the Februray/march 1917 revolution the aviation units were renamed: The Tsarskoe Selo section was renamed the Petrograd AO aviation detachment and in August 1917 it was renamed the 35th KAO Corps Aviation detachment. During the April-may 1917 period the Stavka section was disbanded and reformed as the 15th FAO (Fighter Aviation Detachment).
On 11 November 1915 (NS) when Nicholas and Alexei visited Riga the 20th KAO and other KAOs provided air cover for them but no enemy aircraft were spotted do to inclement weather.
On 13 September 1915 the railroad at the town of lida was bombed by the German army airship ZXII shortly afterwards Nicholas traveled through their by train and recorded 20 people were killed in his diary.
On 31 March/ 12 April 1916 Nicholas was inspecting the 3rd Trans-Amur Infantry Division when according to his letter to Alexandra "During the review we heard our guns firing at Austrian aeroplanes which were dropping bombs on both our bridges over the Dniester." This was near Chotin Russia.
In the book "A Soldier's Notebook" by General A. A. Brusilov ( or whoever wrote it) states: "The review was held with the usual ceremonial, but was marked by no special incident save the appearance of enemy aircraft, which had no success because, in anticipation of their visit, which might have caused a great many casualties had the bombs been dropped on the complete Army Corps there assembled, several anti-aircraft batteries and our squadrons of aeroplanes had been brought up in the vicinity. When the enemy machines showed themselves our batteries greeted them with a lively fire and drove them off. " This book has the attack during a review of the IX corps held after the review of the 3rd Trans-Amur Infantry division.
The Austrian account has the review at Chotin being bombed by 7 of their aircraft and 2 Russian aircraft being shot down by Albatros BI 22.23 flown by Captain Otto Jindra and 1Lt Godwin Brumowski. Brumowski was the observer gunner who later took pilot training and became the top scoring Austrian ace of WW I with 34 victories. Jindra also became an ace with 9 victories during the war. According to the Austrians a spys report confirmed these victories. The Russians reported the 16th KAO had two aircrew killed in two different plane crashes on 13 April 1916 (NS) in this area.